diff --git a/5.028.002-main,threaded-buster/DevelPatchPerl.patch b/5.028.002-main,threaded-buster/DevelPatchPerl.patch
deleted file mode 100644
index 0234f94..0000000
--- a/5.028.002-main,threaded-buster/DevelPatchPerl.patch
+++ /dev/null
@@ -1,104 +0,0 @@
-diff --git a/cpan/Time-Local/t/Local.t b/cpan/Time-Local/t/Local.t
-index 6341396..701d22d 100644
---- a/cpan/Time-Local/t/Local.t
-+++ b/cpan/Time-Local/t/Local.t
-@@ -85,19 +85,17 @@ my $epoch_is_64
- 
- for ( @time, @neg_time ) {
-     my ( $year, $mon, $mday, $hour, $min, $sec ) = @$_;
--    $year -= 1900;
-     $mon--;
- 
- SKIP: {
-         skip '1970 test on VOS fails.', 12
--            if $^O eq 'vos' && $year == 70;
-+            if $^O eq 'vos' && $year == 1970;
-         skip 'this platform does not support negative epochs.', 12
--            if $year < 70 && !$neg_epoch_ok;
-+            if $year < 1970 && !$neg_epoch_ok;
- 
-         # Test timelocal()
-         {
--            my $year_in = $year < 70 ? $year + 1900 : $year;
--            my $time = timelocal( $sec, $min, $hour, $mday, $mon, $year_in );
-+            my $time = timelocal( $sec, $min, $hour, $mday, $mon, $year );
- 
-             my ( $s, $m, $h, $D, $M, $Y ) = localtime($time);
- 
-@@ -106,13 +104,12 @@ SKIP: {
-             is( $h, $hour,     "timelocal hour for @$_" );
-             is( $D, $mday,     "timelocal day for @$_" );
-             is( $M, $mon,      "timelocal month for @$_" );
--            is( $Y, $year,     "timelocal year for @$_" );
-+            is( $Y, $year - 1900,     "timelocal year for @$_" );
-         }
- 
-         # Test timegm()
-         {
--            my $year_in = $year < 70 ? $year + 1900 : $year;
--            my $time = timegm( $sec, $min, $hour, $mday, $mon, $year_in );
-+            my $time = timegm( $sec, $min, $hour, $mday, $mon, $year );
- 
-             my ( $s, $m, $h, $D, $M, $Y ) = gmtime($time);
- 
-@@ -121,14 +118,13 @@ SKIP: {
-             is( $h, $hour,     "timegm hour for @$_" );
-             is( $D, $mday,     "timegm day for @$_" );
-             is( $M, $mon,      "timegm month for @$_" );
--            is( $Y, $year,     "timegm year for @$_" );
-+            is( $Y, $year - 1900,     "timegm year for @$_" );
-         }
-     }
- }
- 
- for (@bad_time) {
-     my ( $year, $mon, $mday, $hour, $min, $sec ) = @$_;
--    $year -= 1900;
-     $mon--;
- 
-     eval { timegm( $sec, $min, $hour, $mday, $mon, $year ) };
-@@ -229,6 +225,30 @@ SKIP:
-     );
- }
- 
-+# 2-digit years
-+{
-+	my $current_year = ( localtime() )[5];
-+	my $pre_break    = ( $current_year + 49 ) - 100;
-+	my $break        = ( $current_year + 50 ) - 100;
-+	my $post_break   = ( $current_year + 51 ) - 100;
-+
-+	is(
-+		( ( localtime( timelocal( 0, 0, 0, 1, 1, $pre_break ) ) )[5] ),
-+		$pre_break + 100,
-+		"year $pre_break is treated as next century",
-+	);
-+	is(
-+		( ( localtime( timelocal( 0, 0, 0, 1, 1, $break ) ) )[5] ),
-+		$break + 100,
-+		"year $break is treated as next century",
-+	);
-+	is(
-+		( ( localtime( timelocal( 0, 0, 0, 1, 1, $post_break ) ) )[5] ),
-+		$post_break,
-+		"year $post_break is treated as current century",
-+	);
-+}
-+
- SKIP:
- {
-     skip 'These tests only run for the package maintainer.', 8
-diff --git a/hints/linux.sh b/hints/linux.sh
-index a985a8e..8cbe7dc 100644
---- a/hints/linux.sh
-+++ b/hints/linux.sh
-@@ -165,6 +165,9 @@ esac
- # plibpth to bypass this check.
- if [ -x /usr/bin/gcc ] ; then
-     gcc=/usr/bin/gcc
-+# clang also provides -print-search-dirs
-+elif ${cc:-cc} --version 2>/dev/null | grep -q '^clang ' ; then
-+    gcc=${cc:-cc}
- else
-     gcc=gcc
- fi
diff --git a/5.028.002-main,threaded-buster/Dockerfile b/5.028.002-main,threaded-buster/Dockerfile
deleted file mode 100644
index 07491b3..0000000
--- a/5.028.002-main,threaded-buster/Dockerfile
+++ /dev/null
@@ -1,29 +0,0 @@
-FROM buildpack-deps:buster
-LABEL maintainer="Peter Martini <PeterCMartini@GMail.com>, Zak B. Elep <zakame@cpan.org>"
-
-COPY *.patch /usr/src/perl/
-WORKDIR /usr/src/perl
-
-RUN true \
-    && curl -SL https://www.cpan.org/src/5.0/perl-5.28.2.tar.xz -o perl-5.28.2.tar.xz \
-    && echo '0b0189bfa4b2da20e899b4bdd746ac402e8f746a58e4fcf5516484157f2aab07 *perl-5.28.2.tar.xz' | sha256sum -c - \
-    && tar --strip-components=1 -xaf perl-5.28.2.tar.xz -C /usr/src/perl \
-    && rm perl-5.28.2.tar.xz \
-    && cat *.patch | patch -p1 \
-    && gnuArch="$(dpkg-architecture --query DEB_BUILD_GNU_TYPE)" \
-    && archBits="$(dpkg-architecture --query DEB_BUILD_ARCH_BITS)" \
-    && archFlag="$([ "$archBits" = '64' ] && echo '-Duse64bitall' || echo '-Duse64bitint')" \
-    && ./Configure -Darchname="$gnuArch" "$archFlag" -Dusethreads -Duseshrplib -Dvendorprefix=/usr/local  -des \
-    && make -j$(nproc) \
-    && TEST_JOBS=$(nproc) make test_harness \
-    && make install \
-    && cd /usr/src \
-    && curl -LO https://www.cpan.org/authors/id/M/MI/MIYAGAWA/App-cpanminus-1.7044.tar.gz \
-    && echo '9b60767fe40752ef7a9d3f13f19060a63389a5c23acc3e9827e19b75500f81f3 *App-cpanminus-1.7044.tar.gz' | sha256sum -c - \
-    && tar -xzf App-cpanminus-1.7044.tar.gz && cd App-cpanminus-1.7044 && perl bin/cpanm . && cd /root \
-    && true \
-    && rm -fr ./cpanm /root/.cpanm /usr/src/perl /usr/src/App-cpanminus-1.7044* /tmp/*
-
-WORKDIR /
-
-CMD ["perl5.28.2","-de0"]
diff --git a/5.028.002-main,threaded-buster/rt-perl-133295.patch b/5.028.002-main,threaded-buster/rt-perl-133295.patch
deleted file mode 100644
index f796373..0000000
--- a/5.028.002-main,threaded-buster/rt-perl-133295.patch
+++ /dev/null
@@ -1,69 +0,0 @@
-From 0d9e812de5885109532ec8bf484f165213ab97cb Mon Sep 17 00:00:00 2001
-From: David Mitchell <davem@iabyn.com>
-Date: Fri, 14 Dec 2018 16:54:42 +0000
-Subject: [PATCH] ext/GDBM_File/t/fatal.t: handle non-fatality
-
-This script is supposed to exercise the error handling callback
-mechanism in gdbm, by triggering an error by surreptitiously closing
-the file handle which gdbm has opened.
-
-However, this doesn't trigger an error in newer releases of the gdbm
-library, which uses mmap() rather than write() etc. In fact I can't see
-any way of triggering an error: so just skip the relevant tests if we
-can't trigger a failure.
----
- ext/GDBM_File/t/fatal.t | 35 ++++++++++++++++++++++++++---------
- 1 file changed, 26 insertions(+), 9 deletions(-)
-
-diff --git a/ext/GDBM_File/t/fatal.t b/ext/GDBM_File/t/fatal.t
-index 3ba66be598c..159916901a9 100644
---- a/ext/GDBM_File/t/fatal.t
-+++ b/ext/GDBM_File/t/fatal.t
-@@ -1,4 +1,12 @@
- #!./perl -w
-+#
-+# Exercise the error handling callback mechanism in gdbm.
-+#
-+# Try to trigger an error by surreptitiously closing the file handle which
-+# gdbm has opened.  Note that this won't trigger an error in newer
-+# releases of the gdbm library, which uses mmap() rather than write() etc:
-+# so skip in that case.
-+
- use strict;
- 
- use Test::More;
-@@ -34,16 +42,25 @@ isnt((open $fh, "<&=$fileno"), undef, "dup fileno $fileno")
-     or diag("\$! = $!");
- isnt(close $fh, undef,
-      "close fileno $fileno, out from underneath the GDBM_File");
--is(eval {
-+
-+# store some data to a closed file handle
-+
-+my $res = eval {
-     $h{Perl} = 'Rules';
-     untie %h;
--    1;
--}, undef, 'Trapped error when attempting to write to knobbled GDBM_File');
--
--# Observed "File write error" and "lseek error" from two different systems.
--# So there might be more variants. Important part was that we trapped the error
--# via croak.
--like($@, qr/ at .*\bfatal\.t line \d+\.\n\z/,
--     'expected error message from GDBM_File');
-+    99;
-+};
-+
-+SKIP: {
-+    skip "Can't tigger failure", 2 if $res == 99;
-+
-+    is $res, undef, "eval should return undef";
-+
-+    # Observed "File write error" and "lseek error" from two different
-+    # systems.  So there might be more variants. Important part was that
-+    # we trapped the error # via croak.
-+    like($@, qr/ at .*\bfatal\.t line \d+\.\n\z/,
-+         'expected error message from GDBM_File');
-+}
- 
- unlink <fatal_dbmx*>;
diff --git a/5.028.002-main,threaded-stretch/DevelPatchPerl.patch b/5.028.002-main,threaded-stretch/DevelPatchPerl.patch
deleted file mode 100644
index 0234f94..0000000
--- a/5.028.002-main,threaded-stretch/DevelPatchPerl.patch
+++ /dev/null
@@ -1,104 +0,0 @@
-diff --git a/cpan/Time-Local/t/Local.t b/cpan/Time-Local/t/Local.t
-index 6341396..701d22d 100644
---- a/cpan/Time-Local/t/Local.t
-+++ b/cpan/Time-Local/t/Local.t
-@@ -85,19 +85,17 @@ my $epoch_is_64
- 
- for ( @time, @neg_time ) {
-     my ( $year, $mon, $mday, $hour, $min, $sec ) = @$_;
--    $year -= 1900;
-     $mon--;
- 
- SKIP: {
-         skip '1970 test on VOS fails.', 12
--            if $^O eq 'vos' && $year == 70;
-+            if $^O eq 'vos' && $year == 1970;
-         skip 'this platform does not support negative epochs.', 12
--            if $year < 70 && !$neg_epoch_ok;
-+            if $year < 1970 && !$neg_epoch_ok;
- 
-         # Test timelocal()
-         {
--            my $year_in = $year < 70 ? $year + 1900 : $year;
--            my $time = timelocal( $sec, $min, $hour, $mday, $mon, $year_in );
-+            my $time = timelocal( $sec, $min, $hour, $mday, $mon, $year );
- 
-             my ( $s, $m, $h, $D, $M, $Y ) = localtime($time);
- 
-@@ -106,13 +104,12 @@ SKIP: {
-             is( $h, $hour,     "timelocal hour for @$_" );
-             is( $D, $mday,     "timelocal day for @$_" );
-             is( $M, $mon,      "timelocal month for @$_" );
--            is( $Y, $year,     "timelocal year for @$_" );
-+            is( $Y, $year - 1900,     "timelocal year for @$_" );
-         }
- 
-         # Test timegm()
-         {
--            my $year_in = $year < 70 ? $year + 1900 : $year;
--            my $time = timegm( $sec, $min, $hour, $mday, $mon, $year_in );
-+            my $time = timegm( $sec, $min, $hour, $mday, $mon, $year );
- 
-             my ( $s, $m, $h, $D, $M, $Y ) = gmtime($time);
- 
-@@ -121,14 +118,13 @@ SKIP: {
-             is( $h, $hour,     "timegm hour for @$_" );
-             is( $D, $mday,     "timegm day for @$_" );
-             is( $M, $mon,      "timegm month for @$_" );
--            is( $Y, $year,     "timegm year for @$_" );
-+            is( $Y, $year - 1900,     "timegm year for @$_" );
-         }
-     }
- }
- 
- for (@bad_time) {
-     my ( $year, $mon, $mday, $hour, $min, $sec ) = @$_;
--    $year -= 1900;
-     $mon--;
- 
-     eval { timegm( $sec, $min, $hour, $mday, $mon, $year ) };
-@@ -229,6 +225,30 @@ SKIP:
-     );
- }
- 
-+# 2-digit years
-+{
-+	my $current_year = ( localtime() )[5];
-+	my $pre_break    = ( $current_year + 49 ) - 100;
-+	my $break        = ( $current_year + 50 ) - 100;
-+	my $post_break   = ( $current_year + 51 ) - 100;
-+
-+	is(
-+		( ( localtime( timelocal( 0, 0, 0, 1, 1, $pre_break ) ) )[5] ),
-+		$pre_break + 100,
-+		"year $pre_break is treated as next century",
-+	);
-+	is(
-+		( ( localtime( timelocal( 0, 0, 0, 1, 1, $break ) ) )[5] ),
-+		$break + 100,
-+		"year $break is treated as next century",
-+	);
-+	is(
-+		( ( localtime( timelocal( 0, 0, 0, 1, 1, $post_break ) ) )[5] ),
-+		$post_break,
-+		"year $post_break is treated as current century",
-+	);
-+}
-+
- SKIP:
- {
-     skip 'These tests only run for the package maintainer.', 8
-diff --git a/hints/linux.sh b/hints/linux.sh
-index a985a8e..8cbe7dc 100644
---- a/hints/linux.sh
-+++ b/hints/linux.sh
-@@ -165,6 +165,9 @@ esac
- # plibpth to bypass this check.
- if [ -x /usr/bin/gcc ] ; then
-     gcc=/usr/bin/gcc
-+# clang also provides -print-search-dirs
-+elif ${cc:-cc} --version 2>/dev/null | grep -q '^clang ' ; then
-+    gcc=${cc:-cc}
- else
-     gcc=gcc
- fi
diff --git a/5.028.002-main,threaded-stretch/Dockerfile b/5.028.002-main,threaded-stretch/Dockerfile
deleted file mode 100644
index a52ce1e..0000000
--- a/5.028.002-main,threaded-stretch/Dockerfile
+++ /dev/null
@@ -1,29 +0,0 @@
-FROM buildpack-deps:stretch
-LABEL maintainer="Peter Martini <PeterCMartini@GMail.com>, Zak B. Elep <zakame@cpan.org>"
-
-COPY *.patch /usr/src/perl/
-WORKDIR /usr/src/perl
-
-RUN true \
-    && curl -SL https://www.cpan.org/src/5.0/perl-5.28.2.tar.xz -o perl-5.28.2.tar.xz \
-    && echo '0b0189bfa4b2da20e899b4bdd746ac402e8f746a58e4fcf5516484157f2aab07 *perl-5.28.2.tar.xz' | sha256sum -c - \
-    && tar --strip-components=1 -xaf perl-5.28.2.tar.xz -C /usr/src/perl \
-    && rm perl-5.28.2.tar.xz \
-    && cat *.patch | patch -p1 \
-    && gnuArch="$(dpkg-architecture --query DEB_BUILD_GNU_TYPE)" \
-    && archBits="$(dpkg-architecture --query DEB_BUILD_ARCH_BITS)" \
-    && archFlag="$([ "$archBits" = '64' ] && echo '-Duse64bitall' || echo '-Duse64bitint')" \
-    && ./Configure -Darchname="$gnuArch" "$archFlag" -Dusethreads -Duseshrplib -Dvendorprefix=/usr/local  -des \
-    && make -j$(nproc) \
-    && TEST_JOBS=$(nproc) make test_harness \
-    && make install \
-    && cd /usr/src \
-    && curl -LO https://www.cpan.org/authors/id/M/MI/MIYAGAWA/App-cpanminus-1.7044.tar.gz \
-    && echo '9b60767fe40752ef7a9d3f13f19060a63389a5c23acc3e9827e19b75500f81f3 *App-cpanminus-1.7044.tar.gz' | sha256sum -c - \
-    && tar -xzf App-cpanminus-1.7044.tar.gz && cd App-cpanminus-1.7044 && perl bin/cpanm . && cd /root \
-    && true \
-    && rm -fr ./cpanm /root/.cpanm /usr/src/perl /usr/src/App-cpanminus-1.7044* /tmp/*
-
-WORKDIR /
-
-CMD ["perl5.28.2","-de0"]
diff --git a/5.028.002-main-buster/DevelPatchPerl.patch b/5.028.002-main-buster/DevelPatchPerl.patch
deleted file mode 100644
index 0234f94..0000000
--- a/5.028.002-main-buster/DevelPatchPerl.patch
+++ /dev/null
@@ -1,104 +0,0 @@
-diff --git a/cpan/Time-Local/t/Local.t b/cpan/Time-Local/t/Local.t
-index 6341396..701d22d 100644
---- a/cpan/Time-Local/t/Local.t
-+++ b/cpan/Time-Local/t/Local.t
-@@ -85,19 +85,17 @@ my $epoch_is_64
- 
- for ( @time, @neg_time ) {
-     my ( $year, $mon, $mday, $hour, $min, $sec ) = @$_;
--    $year -= 1900;
-     $mon--;
- 
- SKIP: {
-         skip '1970 test on VOS fails.', 12
--            if $^O eq 'vos' && $year == 70;
-+            if $^O eq 'vos' && $year == 1970;
-         skip 'this platform does not support negative epochs.', 12
--            if $year < 70 && !$neg_epoch_ok;
-+            if $year < 1970 && !$neg_epoch_ok;
- 
-         # Test timelocal()
-         {
--            my $year_in = $year < 70 ? $year + 1900 : $year;
--            my $time = timelocal( $sec, $min, $hour, $mday, $mon, $year_in );
-+            my $time = timelocal( $sec, $min, $hour, $mday, $mon, $year );
- 
-             my ( $s, $m, $h, $D, $M, $Y ) = localtime($time);
- 
-@@ -106,13 +104,12 @@ SKIP: {
-             is( $h, $hour,     "timelocal hour for @$_" );
-             is( $D, $mday,     "timelocal day for @$_" );
-             is( $M, $mon,      "timelocal month for @$_" );
--            is( $Y, $year,     "timelocal year for @$_" );
-+            is( $Y, $year - 1900,     "timelocal year for @$_" );
-         }
- 
-         # Test timegm()
-         {
--            my $year_in = $year < 70 ? $year + 1900 : $year;
--            my $time = timegm( $sec, $min, $hour, $mday, $mon, $year_in );
-+            my $time = timegm( $sec, $min, $hour, $mday, $mon, $year );
- 
-             my ( $s, $m, $h, $D, $M, $Y ) = gmtime($time);
- 
-@@ -121,14 +118,13 @@ SKIP: {
-             is( $h, $hour,     "timegm hour for @$_" );
-             is( $D, $mday,     "timegm day for @$_" );
-             is( $M, $mon,      "timegm month for @$_" );
--            is( $Y, $year,     "timegm year for @$_" );
-+            is( $Y, $year - 1900,     "timegm year for @$_" );
-         }
-     }
- }
- 
- for (@bad_time) {
-     my ( $year, $mon, $mday, $hour, $min, $sec ) = @$_;
--    $year -= 1900;
-     $mon--;
- 
-     eval { timegm( $sec, $min, $hour, $mday, $mon, $year ) };
-@@ -229,6 +225,30 @@ SKIP:
-     );
- }
- 
-+# 2-digit years
-+{
-+	my $current_year = ( localtime() )[5];
-+	my $pre_break    = ( $current_year + 49 ) - 100;
-+	my $break        = ( $current_year + 50 ) - 100;
-+	my $post_break   = ( $current_year + 51 ) - 100;
-+
-+	is(
-+		( ( localtime( timelocal( 0, 0, 0, 1, 1, $pre_break ) ) )[5] ),
-+		$pre_break + 100,
-+		"year $pre_break is treated as next century",
-+	);
-+	is(
-+		( ( localtime( timelocal( 0, 0, 0, 1, 1, $break ) ) )[5] ),
-+		$break + 100,
-+		"year $break is treated as next century",
-+	);
-+	is(
-+		( ( localtime( timelocal( 0, 0, 0, 1, 1, $post_break ) ) )[5] ),
-+		$post_break,
-+		"year $post_break is treated as current century",
-+	);
-+}
-+
- SKIP:
- {
-     skip 'These tests only run for the package maintainer.', 8
-diff --git a/hints/linux.sh b/hints/linux.sh
-index a985a8e..8cbe7dc 100644
---- a/hints/linux.sh
-+++ b/hints/linux.sh
-@@ -165,6 +165,9 @@ esac
- # plibpth to bypass this check.
- if [ -x /usr/bin/gcc ] ; then
-     gcc=/usr/bin/gcc
-+# clang also provides -print-search-dirs
-+elif ${cc:-cc} --version 2>/dev/null | grep -q '^clang ' ; then
-+    gcc=${cc:-cc}
- else
-     gcc=gcc
- fi
diff --git a/5.028.002-main-buster/Dockerfile b/5.028.002-main-buster/Dockerfile
deleted file mode 100644
index 34838d1..0000000
--- a/5.028.002-main-buster/Dockerfile
+++ /dev/null
@@ -1,29 +0,0 @@
-FROM buildpack-deps:buster
-LABEL maintainer="Peter Martini <PeterCMartini@GMail.com>, Zak B. Elep <zakame@cpan.org>"
-
-COPY *.patch /usr/src/perl/
-WORKDIR /usr/src/perl
-
-RUN true \
-    && curl -SL https://www.cpan.org/src/5.0/perl-5.28.2.tar.xz -o perl-5.28.2.tar.xz \
-    && echo '0b0189bfa4b2da20e899b4bdd746ac402e8f746a58e4fcf5516484157f2aab07 *perl-5.28.2.tar.xz' | sha256sum -c - \
-    && tar --strip-components=1 -xaf perl-5.28.2.tar.xz -C /usr/src/perl \
-    && rm perl-5.28.2.tar.xz \
-    && cat *.patch | patch -p1 \
-    && gnuArch="$(dpkg-architecture --query DEB_BUILD_GNU_TYPE)" \
-    && archBits="$(dpkg-architecture --query DEB_BUILD_ARCH_BITS)" \
-    && archFlag="$([ "$archBits" = '64' ] && echo '-Duse64bitall' || echo '-Duse64bitint')" \
-    && ./Configure -Darchname="$gnuArch" "$archFlag" -Duseshrplib -Dvendorprefix=/usr/local  -des \
-    && make -j$(nproc) \
-    && TEST_JOBS=$(nproc) make test_harness \
-    && make install \
-    && cd /usr/src \
-    && curl -LO https://www.cpan.org/authors/id/M/MI/MIYAGAWA/App-cpanminus-1.7044.tar.gz \
-    && echo '9b60767fe40752ef7a9d3f13f19060a63389a5c23acc3e9827e19b75500f81f3 *App-cpanminus-1.7044.tar.gz' | sha256sum -c - \
-    && tar -xzf App-cpanminus-1.7044.tar.gz && cd App-cpanminus-1.7044 && perl bin/cpanm . && cd /root \
-    && true \
-    && rm -fr ./cpanm /root/.cpanm /usr/src/perl /usr/src/App-cpanminus-1.7044* /tmp/*
-
-WORKDIR /
-
-CMD ["perl5.28.2","-de0"]
diff --git a/5.028.002-main-buster/rt-perl-133295.patch b/5.028.002-main-buster/rt-perl-133295.patch
deleted file mode 100644
index f796373..0000000
--- a/5.028.002-main-buster/rt-perl-133295.patch
+++ /dev/null
@@ -1,69 +0,0 @@
-From 0d9e812de5885109532ec8bf484f165213ab97cb Mon Sep 17 00:00:00 2001
-From: David Mitchell <davem@iabyn.com>
-Date: Fri, 14 Dec 2018 16:54:42 +0000
-Subject: [PATCH] ext/GDBM_File/t/fatal.t: handle non-fatality
-
-This script is supposed to exercise the error handling callback
-mechanism in gdbm, by triggering an error by surreptitiously closing
-the file handle which gdbm has opened.
-
-However, this doesn't trigger an error in newer releases of the gdbm
-library, which uses mmap() rather than write() etc. In fact I can't see
-any way of triggering an error: so just skip the relevant tests if we
-can't trigger a failure.
----
- ext/GDBM_File/t/fatal.t | 35 ++++++++++++++++++++++++++---------
- 1 file changed, 26 insertions(+), 9 deletions(-)
-
-diff --git a/ext/GDBM_File/t/fatal.t b/ext/GDBM_File/t/fatal.t
-index 3ba66be598c..159916901a9 100644
---- a/ext/GDBM_File/t/fatal.t
-+++ b/ext/GDBM_File/t/fatal.t
-@@ -1,4 +1,12 @@
- #!./perl -w
-+#
-+# Exercise the error handling callback mechanism in gdbm.
-+#
-+# Try to trigger an error by surreptitiously closing the file handle which
-+# gdbm has opened.  Note that this won't trigger an error in newer
-+# releases of the gdbm library, which uses mmap() rather than write() etc:
-+# so skip in that case.
-+
- use strict;
- 
- use Test::More;
-@@ -34,16 +42,25 @@ isnt((open $fh, "<&=$fileno"), undef, "dup fileno $fileno")
-     or diag("\$! = $!");
- isnt(close $fh, undef,
-      "close fileno $fileno, out from underneath the GDBM_File");
--is(eval {
-+
-+# store some data to a closed file handle
-+
-+my $res = eval {
-     $h{Perl} = 'Rules';
-     untie %h;
--    1;
--}, undef, 'Trapped error when attempting to write to knobbled GDBM_File');
--
--# Observed "File write error" and "lseek error" from two different systems.
--# So there might be more variants. Important part was that we trapped the error
--# via croak.
--like($@, qr/ at .*\bfatal\.t line \d+\.\n\z/,
--     'expected error message from GDBM_File');
-+    99;
-+};
-+
-+SKIP: {
-+    skip "Can't tigger failure", 2 if $res == 99;
-+
-+    is $res, undef, "eval should return undef";
-+
-+    # Observed "File write error" and "lseek error" from two different
-+    # systems.  So there might be more variants. Important part was that
-+    # we trapped the error # via croak.
-+    like($@, qr/ at .*\bfatal\.t line \d+\.\n\z/,
-+         'expected error message from GDBM_File');
-+}
- 
- unlink <fatal_dbmx*>;
diff --git a/5.028.002-main-stretch/DevelPatchPerl.patch b/5.028.002-main-stretch/DevelPatchPerl.patch
deleted file mode 100644
index 0234f94..0000000
--- a/5.028.002-main-stretch/DevelPatchPerl.patch
+++ /dev/null
@@ -1,104 +0,0 @@
-diff --git a/cpan/Time-Local/t/Local.t b/cpan/Time-Local/t/Local.t
-index 6341396..701d22d 100644
---- a/cpan/Time-Local/t/Local.t
-+++ b/cpan/Time-Local/t/Local.t
-@@ -85,19 +85,17 @@ my $epoch_is_64
- 
- for ( @time, @neg_time ) {
-     my ( $year, $mon, $mday, $hour, $min, $sec ) = @$_;
--    $year -= 1900;
-     $mon--;
- 
- SKIP: {
-         skip '1970 test on VOS fails.', 12
--            if $^O eq 'vos' && $year == 70;
-+            if $^O eq 'vos' && $year == 1970;
-         skip 'this platform does not support negative epochs.', 12
--            if $year < 70 && !$neg_epoch_ok;
-+            if $year < 1970 && !$neg_epoch_ok;
- 
-         # Test timelocal()
-         {
--            my $year_in = $year < 70 ? $year + 1900 : $year;
--            my $time = timelocal( $sec, $min, $hour, $mday, $mon, $year_in );
-+            my $time = timelocal( $sec, $min, $hour, $mday, $mon, $year );
- 
-             my ( $s, $m, $h, $D, $M, $Y ) = localtime($time);
- 
-@@ -106,13 +104,12 @@ SKIP: {
-             is( $h, $hour,     "timelocal hour for @$_" );
-             is( $D, $mday,     "timelocal day for @$_" );
-             is( $M, $mon,      "timelocal month for @$_" );
--            is( $Y, $year,     "timelocal year for @$_" );
-+            is( $Y, $year - 1900,     "timelocal year for @$_" );
-         }
- 
-         # Test timegm()
-         {
--            my $year_in = $year < 70 ? $year + 1900 : $year;
--            my $time = timegm( $sec, $min, $hour, $mday, $mon, $year_in );
-+            my $time = timegm( $sec, $min, $hour, $mday, $mon, $year );
- 
-             my ( $s, $m, $h, $D, $M, $Y ) = gmtime($time);
- 
-@@ -121,14 +118,13 @@ SKIP: {
-             is( $h, $hour,     "timegm hour for @$_" );
-             is( $D, $mday,     "timegm day for @$_" );
-             is( $M, $mon,      "timegm month for @$_" );
--            is( $Y, $year,     "timegm year for @$_" );
-+            is( $Y, $year - 1900,     "timegm year for @$_" );
-         }
-     }
- }
- 
- for (@bad_time) {
-     my ( $year, $mon, $mday, $hour, $min, $sec ) = @$_;
--    $year -= 1900;
-     $mon--;
- 
-     eval { timegm( $sec, $min, $hour, $mday, $mon, $year ) };
-@@ -229,6 +225,30 @@ SKIP:
-     );
- }
- 
-+# 2-digit years
-+{
-+	my $current_year = ( localtime() )[5];
-+	my $pre_break    = ( $current_year + 49 ) - 100;
-+	my $break        = ( $current_year + 50 ) - 100;
-+	my $post_break   = ( $current_year + 51 ) - 100;
-+
-+	is(
-+		( ( localtime( timelocal( 0, 0, 0, 1, 1, $pre_break ) ) )[5] ),
-+		$pre_break + 100,
-+		"year $pre_break is treated as next century",
-+	);
-+	is(
-+		( ( localtime( timelocal( 0, 0, 0, 1, 1, $break ) ) )[5] ),
-+		$break + 100,
-+		"year $break is treated as next century",
-+	);
-+	is(
-+		( ( localtime( timelocal( 0, 0, 0, 1, 1, $post_break ) ) )[5] ),
-+		$post_break,
-+		"year $post_break is treated as current century",
-+	);
-+}
-+
- SKIP:
- {
-     skip 'These tests only run for the package maintainer.', 8
-diff --git a/hints/linux.sh b/hints/linux.sh
-index a985a8e..8cbe7dc 100644
---- a/hints/linux.sh
-+++ b/hints/linux.sh
-@@ -165,6 +165,9 @@ esac
- # plibpth to bypass this check.
- if [ -x /usr/bin/gcc ] ; then
-     gcc=/usr/bin/gcc
-+# clang also provides -print-search-dirs
-+elif ${cc:-cc} --version 2>/dev/null | grep -q '^clang ' ; then
-+    gcc=${cc:-cc}
- else
-     gcc=gcc
- fi
diff --git a/5.028.002-main-stretch/Dockerfile b/5.028.002-main-stretch/Dockerfile
deleted file mode 100644
index 9b83ac6..0000000
--- a/5.028.002-main-stretch/Dockerfile
+++ /dev/null
@@ -1,29 +0,0 @@
-FROM buildpack-deps:stretch
-LABEL maintainer="Peter Martini <PeterCMartini@GMail.com>, Zak B. Elep <zakame@cpan.org>"
-
-COPY *.patch /usr/src/perl/
-WORKDIR /usr/src/perl
-
-RUN true \
-    && curl -SL https://www.cpan.org/src/5.0/perl-5.28.2.tar.xz -o perl-5.28.2.tar.xz \
-    && echo '0b0189bfa4b2da20e899b4bdd746ac402e8f746a58e4fcf5516484157f2aab07 *perl-5.28.2.tar.xz' | sha256sum -c - \
-    && tar --strip-components=1 -xaf perl-5.28.2.tar.xz -C /usr/src/perl \
-    && rm perl-5.28.2.tar.xz \
-    && cat *.patch | patch -p1 \
-    && gnuArch="$(dpkg-architecture --query DEB_BUILD_GNU_TYPE)" \
-    && archBits="$(dpkg-architecture --query DEB_BUILD_ARCH_BITS)" \
-    && archFlag="$([ "$archBits" = '64' ] && echo '-Duse64bitall' || echo '-Duse64bitint')" \
-    && ./Configure -Darchname="$gnuArch" "$archFlag" -Duseshrplib -Dvendorprefix=/usr/local  -des \
-    && make -j$(nproc) \
-    && TEST_JOBS=$(nproc) make test_harness \
-    && make install \
-    && cd /usr/src \
-    && curl -LO https://www.cpan.org/authors/id/M/MI/MIYAGAWA/App-cpanminus-1.7044.tar.gz \
-    && echo '9b60767fe40752ef7a9d3f13f19060a63389a5c23acc3e9827e19b75500f81f3 *App-cpanminus-1.7044.tar.gz' | sha256sum -c - \
-    && tar -xzf App-cpanminus-1.7044.tar.gz && cd App-cpanminus-1.7044 && perl bin/cpanm . && cd /root \
-    && true \
-    && rm -fr ./cpanm /root/.cpanm /usr/src/perl /usr/src/App-cpanminus-1.7044* /tmp/*
-
-WORKDIR /
-
-CMD ["perl5.28.2","-de0"]
diff --git a/5.028.002-slim,threaded-buster/DevelPatchPerl.patch b/5.028.002-slim,threaded-buster/DevelPatchPerl.patch
deleted file mode 100644
index 0234f94..0000000
--- a/5.028.002-slim,threaded-buster/DevelPatchPerl.patch
+++ /dev/null
@@ -1,104 +0,0 @@
-diff --git a/cpan/Time-Local/t/Local.t b/cpan/Time-Local/t/Local.t
-index 6341396..701d22d 100644
---- a/cpan/Time-Local/t/Local.t
-+++ b/cpan/Time-Local/t/Local.t
-@@ -85,19 +85,17 @@ my $epoch_is_64
- 
- for ( @time, @neg_time ) {
-     my ( $year, $mon, $mday, $hour, $min, $sec ) = @$_;
--    $year -= 1900;
-     $mon--;
- 
- SKIP: {
-         skip '1970 test on VOS fails.', 12
--            if $^O eq 'vos' && $year == 70;
-+            if $^O eq 'vos' && $year == 1970;
-         skip 'this platform does not support negative epochs.', 12
--            if $year < 70 && !$neg_epoch_ok;
-+            if $year < 1970 && !$neg_epoch_ok;
- 
-         # Test timelocal()
-         {
--            my $year_in = $year < 70 ? $year + 1900 : $year;
--            my $time = timelocal( $sec, $min, $hour, $mday, $mon, $year_in );
-+            my $time = timelocal( $sec, $min, $hour, $mday, $mon, $year );
- 
-             my ( $s, $m, $h, $D, $M, $Y ) = localtime($time);
- 
-@@ -106,13 +104,12 @@ SKIP: {
-             is( $h, $hour,     "timelocal hour for @$_" );
-             is( $D, $mday,     "timelocal day for @$_" );
-             is( $M, $mon,      "timelocal month for @$_" );
--            is( $Y, $year,     "timelocal year for @$_" );
-+            is( $Y, $year - 1900,     "timelocal year for @$_" );
-         }
- 
-         # Test timegm()
-         {
--            my $year_in = $year < 70 ? $year + 1900 : $year;
--            my $time = timegm( $sec, $min, $hour, $mday, $mon, $year_in );
-+            my $time = timegm( $sec, $min, $hour, $mday, $mon, $year );
- 
-             my ( $s, $m, $h, $D, $M, $Y ) = gmtime($time);
- 
-@@ -121,14 +118,13 @@ SKIP: {
-             is( $h, $hour,     "timegm hour for @$_" );
-             is( $D, $mday,     "timegm day for @$_" );
-             is( $M, $mon,      "timegm month for @$_" );
--            is( $Y, $year,     "timegm year for @$_" );
-+            is( $Y, $year - 1900,     "timegm year for @$_" );
-         }
-     }
- }
- 
- for (@bad_time) {
-     my ( $year, $mon, $mday, $hour, $min, $sec ) = @$_;
--    $year -= 1900;
-     $mon--;
- 
-     eval { timegm( $sec, $min, $hour, $mday, $mon, $year ) };
-@@ -229,6 +225,30 @@ SKIP:
-     );
- }
- 
-+# 2-digit years
-+{
-+	my $current_year = ( localtime() )[5];
-+	my $pre_break    = ( $current_year + 49 ) - 100;
-+	my $break        = ( $current_year + 50 ) - 100;
-+	my $post_break   = ( $current_year + 51 ) - 100;
-+
-+	is(
-+		( ( localtime( timelocal( 0, 0, 0, 1, 1, $pre_break ) ) )[5] ),
-+		$pre_break + 100,
-+		"year $pre_break is treated as next century",
-+	);
-+	is(
-+		( ( localtime( timelocal( 0, 0, 0, 1, 1, $break ) ) )[5] ),
-+		$break + 100,
-+		"year $break is treated as next century",
-+	);
-+	is(
-+		( ( localtime( timelocal( 0, 0, 0, 1, 1, $post_break ) ) )[5] ),
-+		$post_break,
-+		"year $post_break is treated as current century",
-+	);
-+}
-+
- SKIP:
- {
-     skip 'These tests only run for the package maintainer.', 8
-diff --git a/hints/linux.sh b/hints/linux.sh
-index a985a8e..8cbe7dc 100644
---- a/hints/linux.sh
-+++ b/hints/linux.sh
-@@ -165,6 +165,9 @@ esac
- # plibpth to bypass this check.
- if [ -x /usr/bin/gcc ] ; then
-     gcc=/usr/bin/gcc
-+# clang also provides -print-search-dirs
-+elif ${cc:-cc} --version 2>/dev/null | grep -q '^clang ' ; then
-+    gcc=${cc:-cc}
- else
-     gcc=gcc
- fi
diff --git a/5.028.002-slim,threaded-buster/Dockerfile b/5.028.002-slim,threaded-buster/Dockerfile
deleted file mode 100644
index cc701af..0000000
--- a/5.028.002-slim,threaded-buster/Dockerfile
+++ /dev/null
@@ -1,53 +0,0 @@
-FROM debian:buster-slim
-LABEL maintainer="Peter Martini <PeterCMartini@GMail.com>, Zak B. Elep <zakame@cpan.org>"
-
-COPY *.patch /usr/src/perl/
-WORKDIR /usr/src/perl
-
-RUN apt-get update \
-    && apt-get install -y --no-install-recommends \
-       bzip2 \
-       ca-certificates \
-       # cpio \
-       curl \
-       dpkg-dev \
-       # file \
-       gcc \
-       # g++ \
-       # libbz2-dev \
-       # libdb-dev \
-       libc6-dev \
-       # libgdbm-dev \
-       # liblzma-dev \
-       make \
-       netbase \
-       patch \
-       # procps \
-       # zlib1g-dev \
-       xz-utils \
-    && curl -SL https://www.cpan.org/src/5.0/perl-5.28.2.tar.xz -o perl-5.28.2.tar.xz \
-    && echo '0b0189bfa4b2da20e899b4bdd746ac402e8f746a58e4fcf5516484157f2aab07 *perl-5.28.2.tar.xz' | sha256sum -c - \
-    && tar --strip-components=1 -xaf perl-5.28.2.tar.xz -C /usr/src/perl \
-    && rm perl-5.28.2.tar.xz \
-    && cat *.patch | patch -p1 \
-    && gnuArch="$(dpkg-architecture --query DEB_BUILD_GNU_TYPE)" \
-    && archBits="$(dpkg-architecture --query DEB_BUILD_ARCH_BITS)" \
-    && archFlag="$([ "$archBits" = '64' ] && echo '-Duse64bitall' || echo '-Duse64bitint')" \
-    && ./Configure -Darchname="$gnuArch" "$archFlag" -Dusethreads -Duseshrplib -Dvendorprefix=/usr/local  -des \
-    && make -j$(nproc) \
-    && TEST_JOBS=$(nproc) make test_harness \
-    && make install \
-    && cd /usr/src \
-    && curl -LO https://www.cpan.org/authors/id/M/MI/MIYAGAWA/App-cpanminus-1.7044.tar.gz \
-    && echo '9b60767fe40752ef7a9d3f13f19060a63389a5c23acc3e9827e19b75500f81f3 *App-cpanminus-1.7044.tar.gz' | sha256sum -c - \
-    && tar -xzf App-cpanminus-1.7044.tar.gz && cd App-cpanminus-1.7044 && perl bin/cpanm . && cd /root \
-    && savedPackages="make netbase" \
-    && apt-mark auto '.*' > /dev/null \
-    && apt-mark manual $savedPackages \
-    && apt-get purge -y --auto-remove -o APT::AutoRemove::RecommendsImportant=false \
-    && rm -fr /var/cache/apt/* /var/lib/apt/lists/* \
-    && rm -fr ./cpanm /root/.cpanm /usr/src/perl /usr/src/App-cpanminus-1.7044* /tmp/*
-
-WORKDIR /
-
-CMD ["perl5.28.2","-de0"]
diff --git a/5.028.002-slim,threaded-buster/rt-perl-133295.patch b/5.028.002-slim,threaded-buster/rt-perl-133295.patch
deleted file mode 100644
index f796373..0000000
--- a/5.028.002-slim,threaded-buster/rt-perl-133295.patch
+++ /dev/null
@@ -1,69 +0,0 @@
-From 0d9e812de5885109532ec8bf484f165213ab97cb Mon Sep 17 00:00:00 2001
-From: David Mitchell <davem@iabyn.com>
-Date: Fri, 14 Dec 2018 16:54:42 +0000
-Subject: [PATCH] ext/GDBM_File/t/fatal.t: handle non-fatality
-
-This script is supposed to exercise the error handling callback
-mechanism in gdbm, by triggering an error by surreptitiously closing
-the file handle which gdbm has opened.
-
-However, this doesn't trigger an error in newer releases of the gdbm
-library, which uses mmap() rather than write() etc. In fact I can't see
-any way of triggering an error: so just skip the relevant tests if we
-can't trigger a failure.
----
- ext/GDBM_File/t/fatal.t | 35 ++++++++++++++++++++++++++---------
- 1 file changed, 26 insertions(+), 9 deletions(-)
-
-diff --git a/ext/GDBM_File/t/fatal.t b/ext/GDBM_File/t/fatal.t
-index 3ba66be598c..159916901a9 100644
---- a/ext/GDBM_File/t/fatal.t
-+++ b/ext/GDBM_File/t/fatal.t
-@@ -1,4 +1,12 @@
- #!./perl -w
-+#
-+# Exercise the error handling callback mechanism in gdbm.
-+#
-+# Try to trigger an error by surreptitiously closing the file handle which
-+# gdbm has opened.  Note that this won't trigger an error in newer
-+# releases of the gdbm library, which uses mmap() rather than write() etc:
-+# so skip in that case.
-+
- use strict;
- 
- use Test::More;
-@@ -34,16 +42,25 @@ isnt((open $fh, "<&=$fileno"), undef, "dup fileno $fileno")
-     or diag("\$! = $!");
- isnt(close $fh, undef,
-      "close fileno $fileno, out from underneath the GDBM_File");
--is(eval {
-+
-+# store some data to a closed file handle
-+
-+my $res = eval {
-     $h{Perl} = 'Rules';
-     untie %h;
--    1;
--}, undef, 'Trapped error when attempting to write to knobbled GDBM_File');
--
--# Observed "File write error" and "lseek error" from two different systems.
--# So there might be more variants. Important part was that we trapped the error
--# via croak.
--like($@, qr/ at .*\bfatal\.t line \d+\.\n\z/,
--     'expected error message from GDBM_File');
-+    99;
-+};
-+
-+SKIP: {
-+    skip "Can't tigger failure", 2 if $res == 99;
-+
-+    is $res, undef, "eval should return undef";
-+
-+    # Observed "File write error" and "lseek error" from two different
-+    # systems.  So there might be more variants. Important part was that
-+    # we trapped the error # via croak.
-+    like($@, qr/ at .*\bfatal\.t line \d+\.\n\z/,
-+         'expected error message from GDBM_File');
-+}
- 
- unlink <fatal_dbmx*>;
diff --git a/5.028.002-slim,threaded-stretch/DevelPatchPerl.patch b/5.028.002-slim,threaded-stretch/DevelPatchPerl.patch
deleted file mode 100644
index 0234f94..0000000
--- a/5.028.002-slim,threaded-stretch/DevelPatchPerl.patch
+++ /dev/null
@@ -1,104 +0,0 @@
-diff --git a/cpan/Time-Local/t/Local.t b/cpan/Time-Local/t/Local.t
-index 6341396..701d22d 100644
---- a/cpan/Time-Local/t/Local.t
-+++ b/cpan/Time-Local/t/Local.t
-@@ -85,19 +85,17 @@ my $epoch_is_64
- 
- for ( @time, @neg_time ) {
-     my ( $year, $mon, $mday, $hour, $min, $sec ) = @$_;
--    $year -= 1900;
-     $mon--;
- 
- SKIP: {
-         skip '1970 test on VOS fails.', 12
--            if $^O eq 'vos' && $year == 70;
-+            if $^O eq 'vos' && $year == 1970;
-         skip 'this platform does not support negative epochs.', 12
--            if $year < 70 && !$neg_epoch_ok;
-+            if $year < 1970 && !$neg_epoch_ok;
- 
-         # Test timelocal()
-         {
--            my $year_in = $year < 70 ? $year + 1900 : $year;
--            my $time = timelocal( $sec, $min, $hour, $mday, $mon, $year_in );
-+            my $time = timelocal( $sec, $min, $hour, $mday, $mon, $year );
- 
-             my ( $s, $m, $h, $D, $M, $Y ) = localtime($time);
- 
-@@ -106,13 +104,12 @@ SKIP: {
-             is( $h, $hour,     "timelocal hour for @$_" );
-             is( $D, $mday,     "timelocal day for @$_" );
-             is( $M, $mon,      "timelocal month for @$_" );
--            is( $Y, $year,     "timelocal year for @$_" );
-+            is( $Y, $year - 1900,     "timelocal year for @$_" );
-         }
- 
-         # Test timegm()
-         {
--            my $year_in = $year < 70 ? $year + 1900 : $year;
--            my $time = timegm( $sec, $min, $hour, $mday, $mon, $year_in );
-+            my $time = timegm( $sec, $min, $hour, $mday, $mon, $year );
- 
-             my ( $s, $m, $h, $D, $M, $Y ) = gmtime($time);
- 
-@@ -121,14 +118,13 @@ SKIP: {
-             is( $h, $hour,     "timegm hour for @$_" );
-             is( $D, $mday,     "timegm day for @$_" );
-             is( $M, $mon,      "timegm month for @$_" );
--            is( $Y, $year,     "timegm year for @$_" );
-+            is( $Y, $year - 1900,     "timegm year for @$_" );
-         }
-     }
- }
- 
- for (@bad_time) {
-     my ( $year, $mon, $mday, $hour, $min, $sec ) = @$_;
--    $year -= 1900;
-     $mon--;
- 
-     eval { timegm( $sec, $min, $hour, $mday, $mon, $year ) };
-@@ -229,6 +225,30 @@ SKIP:
-     );
- }
- 
-+# 2-digit years
-+{
-+	my $current_year = ( localtime() )[5];
-+	my $pre_break    = ( $current_year + 49 ) - 100;
-+	my $break        = ( $current_year + 50 ) - 100;
-+	my $post_break   = ( $current_year + 51 ) - 100;
-+
-+	is(
-+		( ( localtime( timelocal( 0, 0, 0, 1, 1, $pre_break ) ) )[5] ),
-+		$pre_break + 100,
-+		"year $pre_break is treated as next century",
-+	);
-+	is(
-+		( ( localtime( timelocal( 0, 0, 0, 1, 1, $break ) ) )[5] ),
-+		$break + 100,
-+		"year $break is treated as next century",
-+	);
-+	is(
-+		( ( localtime( timelocal( 0, 0, 0, 1, 1, $post_break ) ) )[5] ),
-+		$post_break,
-+		"year $post_break is treated as current century",
-+	);
-+}
-+
- SKIP:
- {
-     skip 'These tests only run for the package maintainer.', 8
-diff --git a/hints/linux.sh b/hints/linux.sh
-index a985a8e..8cbe7dc 100644
---- a/hints/linux.sh
-+++ b/hints/linux.sh
-@@ -165,6 +165,9 @@ esac
- # plibpth to bypass this check.
- if [ -x /usr/bin/gcc ] ; then
-     gcc=/usr/bin/gcc
-+# clang also provides -print-search-dirs
-+elif ${cc:-cc} --version 2>/dev/null | grep -q '^clang ' ; then
-+    gcc=${cc:-cc}
- else
-     gcc=gcc
- fi
diff --git a/5.028.002-slim,threaded-stretch/Dockerfile b/5.028.002-slim,threaded-stretch/Dockerfile
deleted file mode 100644
index ed61e34..0000000
--- a/5.028.002-slim,threaded-stretch/Dockerfile
+++ /dev/null
@@ -1,53 +0,0 @@
-FROM debian:stretch-slim
-LABEL maintainer="Peter Martini <PeterCMartini@GMail.com>, Zak B. Elep <zakame@cpan.org>"
-
-COPY *.patch /usr/src/perl/
-WORKDIR /usr/src/perl
-
-RUN apt-get update \
-    && apt-get install -y --no-install-recommends \
-       bzip2 \
-       ca-certificates \
-       # cpio \
-       curl \
-       dpkg-dev \
-       # file \
-       gcc \
-       # g++ \
-       # libbz2-dev \
-       # libdb-dev \
-       libc6-dev \
-       # libgdbm-dev \
-       # liblzma-dev \
-       make \
-       netbase \
-       patch \
-       # procps \
-       # zlib1g-dev \
-       xz-utils \
-    && curl -SL https://www.cpan.org/src/5.0/perl-5.28.2.tar.xz -o perl-5.28.2.tar.xz \
-    && echo '0b0189bfa4b2da20e899b4bdd746ac402e8f746a58e4fcf5516484157f2aab07 *perl-5.28.2.tar.xz' | sha256sum -c - \
-    && tar --strip-components=1 -xaf perl-5.28.2.tar.xz -C /usr/src/perl \
-    && rm perl-5.28.2.tar.xz \
-    && cat *.patch | patch -p1 \
-    && gnuArch="$(dpkg-architecture --query DEB_BUILD_GNU_TYPE)" \
-    && archBits="$(dpkg-architecture --query DEB_BUILD_ARCH_BITS)" \
-    && archFlag="$([ "$archBits" = '64' ] && echo '-Duse64bitall' || echo '-Duse64bitint')" \
-    && ./Configure -Darchname="$gnuArch" "$archFlag" -Dusethreads -Duseshrplib -Dvendorprefix=/usr/local  -des \
-    && make -j$(nproc) \
-    && TEST_JOBS=$(nproc) make test_harness \
-    && make install \
-    && cd /usr/src \
-    && curl -LO https://www.cpan.org/authors/id/M/MI/MIYAGAWA/App-cpanminus-1.7044.tar.gz \
-    && echo '9b60767fe40752ef7a9d3f13f19060a63389a5c23acc3e9827e19b75500f81f3 *App-cpanminus-1.7044.tar.gz' | sha256sum -c - \
-    && tar -xzf App-cpanminus-1.7044.tar.gz && cd App-cpanminus-1.7044 && perl bin/cpanm . && cd /root \
-    && savedPackages="make netbase" \
-    && apt-mark auto '.*' > /dev/null \
-    && apt-mark manual $savedPackages \
-    && apt-get purge -y --auto-remove -o APT::AutoRemove::RecommendsImportant=false \
-    && rm -fr /var/cache/apt/* /var/lib/apt/lists/* \
-    && rm -fr ./cpanm /root/.cpanm /usr/src/perl /usr/src/App-cpanminus-1.7044* /tmp/*
-
-WORKDIR /
-
-CMD ["perl5.28.2","-de0"]
diff --git a/5.028.002-slim-buster/DevelPatchPerl.patch b/5.028.002-slim-buster/DevelPatchPerl.patch
deleted file mode 100644
index 0234f94..0000000
--- a/5.028.002-slim-buster/DevelPatchPerl.patch
+++ /dev/null
@@ -1,104 +0,0 @@
-diff --git a/cpan/Time-Local/t/Local.t b/cpan/Time-Local/t/Local.t
-index 6341396..701d22d 100644
---- a/cpan/Time-Local/t/Local.t
-+++ b/cpan/Time-Local/t/Local.t
-@@ -85,19 +85,17 @@ my $epoch_is_64
- 
- for ( @time, @neg_time ) {
-     my ( $year, $mon, $mday, $hour, $min, $sec ) = @$_;
--    $year -= 1900;
-     $mon--;
- 
- SKIP: {
-         skip '1970 test on VOS fails.', 12
--            if $^O eq 'vos' && $year == 70;
-+            if $^O eq 'vos' && $year == 1970;
-         skip 'this platform does not support negative epochs.', 12
--            if $year < 70 && !$neg_epoch_ok;
-+            if $year < 1970 && !$neg_epoch_ok;
- 
-         # Test timelocal()
-         {
--            my $year_in = $year < 70 ? $year + 1900 : $year;
--            my $time = timelocal( $sec, $min, $hour, $mday, $mon, $year_in );
-+            my $time = timelocal( $sec, $min, $hour, $mday, $mon, $year );
- 
-             my ( $s, $m, $h, $D, $M, $Y ) = localtime($time);
- 
-@@ -106,13 +104,12 @@ SKIP: {
-             is( $h, $hour,     "timelocal hour for @$_" );
-             is( $D, $mday,     "timelocal day for @$_" );
-             is( $M, $mon,      "timelocal month for @$_" );
--            is( $Y, $year,     "timelocal year for @$_" );
-+            is( $Y, $year - 1900,     "timelocal year for @$_" );
-         }
- 
-         # Test timegm()
-         {
--            my $year_in = $year < 70 ? $year + 1900 : $year;
--            my $time = timegm( $sec, $min, $hour, $mday, $mon, $year_in );
-+            my $time = timegm( $sec, $min, $hour, $mday, $mon, $year );
- 
-             my ( $s, $m, $h, $D, $M, $Y ) = gmtime($time);
- 
-@@ -121,14 +118,13 @@ SKIP: {
-             is( $h, $hour,     "timegm hour for @$_" );
-             is( $D, $mday,     "timegm day for @$_" );
-             is( $M, $mon,      "timegm month for @$_" );
--            is( $Y, $year,     "timegm year for @$_" );
-+            is( $Y, $year - 1900,     "timegm year for @$_" );
-         }
-     }
- }
- 
- for (@bad_time) {
-     my ( $year, $mon, $mday, $hour, $min, $sec ) = @$_;
--    $year -= 1900;
-     $mon--;
- 
-     eval { timegm( $sec, $min, $hour, $mday, $mon, $year ) };
-@@ -229,6 +225,30 @@ SKIP:
-     );
- }
- 
-+# 2-digit years
-+{
-+	my $current_year = ( localtime() )[5];
-+	my $pre_break    = ( $current_year + 49 ) - 100;
-+	my $break        = ( $current_year + 50 ) - 100;
-+	my $post_break   = ( $current_year + 51 ) - 100;
-+
-+	is(
-+		( ( localtime( timelocal( 0, 0, 0, 1, 1, $pre_break ) ) )[5] ),
-+		$pre_break + 100,
-+		"year $pre_break is treated as next century",
-+	);
-+	is(
-+		( ( localtime( timelocal( 0, 0, 0, 1, 1, $break ) ) )[5] ),
-+		$break + 100,
-+		"year $break is treated as next century",
-+	);
-+	is(
-+		( ( localtime( timelocal( 0, 0, 0, 1, 1, $post_break ) ) )[5] ),
-+		$post_break,
-+		"year $post_break is treated as current century",
-+	);
-+}
-+
- SKIP:
- {
-     skip 'These tests only run for the package maintainer.', 8
-diff --git a/hints/linux.sh b/hints/linux.sh
-index a985a8e..8cbe7dc 100644
---- a/hints/linux.sh
-+++ b/hints/linux.sh
-@@ -165,6 +165,9 @@ esac
- # plibpth to bypass this check.
- if [ -x /usr/bin/gcc ] ; then
-     gcc=/usr/bin/gcc
-+# clang also provides -print-search-dirs
-+elif ${cc:-cc} --version 2>/dev/null | grep -q '^clang ' ; then
-+    gcc=${cc:-cc}
- else
-     gcc=gcc
- fi
diff --git a/5.028.002-slim-buster/Dockerfile b/5.028.002-slim-buster/Dockerfile
deleted file mode 100644
index 515881d..0000000
--- a/5.028.002-slim-buster/Dockerfile
+++ /dev/null
@@ -1,53 +0,0 @@
-FROM debian:buster-slim
-LABEL maintainer="Peter Martini <PeterCMartini@GMail.com>, Zak B. Elep <zakame@cpan.org>"
-
-COPY *.patch /usr/src/perl/
-WORKDIR /usr/src/perl
-
-RUN apt-get update \
-    && apt-get install -y --no-install-recommends \
-       bzip2 \
-       ca-certificates \
-       # cpio \
-       curl \
-       dpkg-dev \
-       # file \
-       gcc \
-       # g++ \
-       # libbz2-dev \
-       # libdb-dev \
-       libc6-dev \
-       # libgdbm-dev \
-       # liblzma-dev \
-       make \
-       netbase \
-       patch \
-       # procps \
-       # zlib1g-dev \
-       xz-utils \
-    && curl -SL https://www.cpan.org/src/5.0/perl-5.28.2.tar.xz -o perl-5.28.2.tar.xz \
-    && echo '0b0189bfa4b2da20e899b4bdd746ac402e8f746a58e4fcf5516484157f2aab07 *perl-5.28.2.tar.xz' | sha256sum -c - \
-    && tar --strip-components=1 -xaf perl-5.28.2.tar.xz -C /usr/src/perl \
-    && rm perl-5.28.2.tar.xz \
-    && cat *.patch | patch -p1 \
-    && gnuArch="$(dpkg-architecture --query DEB_BUILD_GNU_TYPE)" \
-    && archBits="$(dpkg-architecture --query DEB_BUILD_ARCH_BITS)" \
-    && archFlag="$([ "$archBits" = '64' ] && echo '-Duse64bitall' || echo '-Duse64bitint')" \
-    && ./Configure -Darchname="$gnuArch" "$archFlag" -Duseshrplib -Dvendorprefix=/usr/local  -des \
-    && make -j$(nproc) \
-    && TEST_JOBS=$(nproc) make test_harness \
-    && make install \
-    && cd /usr/src \
-    && curl -LO https://www.cpan.org/authors/id/M/MI/MIYAGAWA/App-cpanminus-1.7044.tar.gz \
-    && echo '9b60767fe40752ef7a9d3f13f19060a63389a5c23acc3e9827e19b75500f81f3 *App-cpanminus-1.7044.tar.gz' | sha256sum -c - \
-    && tar -xzf App-cpanminus-1.7044.tar.gz && cd App-cpanminus-1.7044 && perl bin/cpanm . && cd /root \
-    && savedPackages="make netbase" \
-    && apt-mark auto '.*' > /dev/null \
-    && apt-mark manual $savedPackages \
-    && apt-get purge -y --auto-remove -o APT::AutoRemove::RecommendsImportant=false \
-    && rm -fr /var/cache/apt/* /var/lib/apt/lists/* \
-    && rm -fr ./cpanm /root/.cpanm /usr/src/perl /usr/src/App-cpanminus-1.7044* /tmp/*
-
-WORKDIR /
-
-CMD ["perl5.28.2","-de0"]
diff --git a/5.028.002-slim-buster/rt-perl-133295.patch b/5.028.002-slim-buster/rt-perl-133295.patch
deleted file mode 100644
index f796373..0000000
--- a/5.028.002-slim-buster/rt-perl-133295.patch
+++ /dev/null
@@ -1,69 +0,0 @@
-From 0d9e812de5885109532ec8bf484f165213ab97cb Mon Sep 17 00:00:00 2001
-From: David Mitchell <davem@iabyn.com>
-Date: Fri, 14 Dec 2018 16:54:42 +0000
-Subject: [PATCH] ext/GDBM_File/t/fatal.t: handle non-fatality
-
-This script is supposed to exercise the error handling callback
-mechanism in gdbm, by triggering an error by surreptitiously closing
-the file handle which gdbm has opened.
-
-However, this doesn't trigger an error in newer releases of the gdbm
-library, which uses mmap() rather than write() etc. In fact I can't see
-any way of triggering an error: so just skip the relevant tests if we
-can't trigger a failure.
----
- ext/GDBM_File/t/fatal.t | 35 ++++++++++++++++++++++++++---------
- 1 file changed, 26 insertions(+), 9 deletions(-)
-
-diff --git a/ext/GDBM_File/t/fatal.t b/ext/GDBM_File/t/fatal.t
-index 3ba66be598c..159916901a9 100644
---- a/ext/GDBM_File/t/fatal.t
-+++ b/ext/GDBM_File/t/fatal.t
-@@ -1,4 +1,12 @@
- #!./perl -w
-+#
-+# Exercise the error handling callback mechanism in gdbm.
-+#
-+# Try to trigger an error by surreptitiously closing the file handle which
-+# gdbm has opened.  Note that this won't trigger an error in newer
-+# releases of the gdbm library, which uses mmap() rather than write() etc:
-+# so skip in that case.
-+
- use strict;
- 
- use Test::More;
-@@ -34,16 +42,25 @@ isnt((open $fh, "<&=$fileno"), undef, "dup fileno $fileno")
-     or diag("\$! = $!");
- isnt(close $fh, undef,
-      "close fileno $fileno, out from underneath the GDBM_File");
--is(eval {
-+
-+# store some data to a closed file handle
-+
-+my $res = eval {
-     $h{Perl} = 'Rules';
-     untie %h;
--    1;
--}, undef, 'Trapped error when attempting to write to knobbled GDBM_File');
--
--# Observed "File write error" and "lseek error" from two different systems.
--# So there might be more variants. Important part was that we trapped the error
--# via croak.
--like($@, qr/ at .*\bfatal\.t line \d+\.\n\z/,
--     'expected error message from GDBM_File');
-+    99;
-+};
-+
-+SKIP: {
-+    skip "Can't tigger failure", 2 if $res == 99;
-+
-+    is $res, undef, "eval should return undef";
-+
-+    # Observed "File write error" and "lseek error" from two different
-+    # systems.  So there might be more variants. Important part was that
-+    # we trapped the error # via croak.
-+    like($@, qr/ at .*\bfatal\.t line \d+\.\n\z/,
-+         'expected error message from GDBM_File');
-+}
- 
- unlink <fatal_dbmx*>;
diff --git a/5.028.002-slim-stretch/DevelPatchPerl.patch b/5.028.002-slim-stretch/DevelPatchPerl.patch
deleted file mode 100644
index 0234f94..0000000
--- a/5.028.002-slim-stretch/DevelPatchPerl.patch
+++ /dev/null
@@ -1,104 +0,0 @@
-diff --git a/cpan/Time-Local/t/Local.t b/cpan/Time-Local/t/Local.t
-index 6341396..701d22d 100644
---- a/cpan/Time-Local/t/Local.t
-+++ b/cpan/Time-Local/t/Local.t
-@@ -85,19 +85,17 @@ my $epoch_is_64
- 
- for ( @time, @neg_time ) {
-     my ( $year, $mon, $mday, $hour, $min, $sec ) = @$_;
--    $year -= 1900;
-     $mon--;
- 
- SKIP: {
-         skip '1970 test on VOS fails.', 12
--            if $^O eq 'vos' && $year == 70;
-+            if $^O eq 'vos' && $year == 1970;
-         skip 'this platform does not support negative epochs.', 12
--            if $year < 70 && !$neg_epoch_ok;
-+            if $year < 1970 && !$neg_epoch_ok;
- 
-         # Test timelocal()
-         {
--            my $year_in = $year < 70 ? $year + 1900 : $year;
--            my $time = timelocal( $sec, $min, $hour, $mday, $mon, $year_in );
-+            my $time = timelocal( $sec, $min, $hour, $mday, $mon, $year );
- 
-             my ( $s, $m, $h, $D, $M, $Y ) = localtime($time);
- 
-@@ -106,13 +104,12 @@ SKIP: {
-             is( $h, $hour,     "timelocal hour for @$_" );
-             is( $D, $mday,     "timelocal day for @$_" );
-             is( $M, $mon,      "timelocal month for @$_" );
--            is( $Y, $year,     "timelocal year for @$_" );
-+            is( $Y, $year - 1900,     "timelocal year for @$_" );
-         }
- 
-         # Test timegm()
-         {
--            my $year_in = $year < 70 ? $year + 1900 : $year;
--            my $time = timegm( $sec, $min, $hour, $mday, $mon, $year_in );
-+            my $time = timegm( $sec, $min, $hour, $mday, $mon, $year );
- 
-             my ( $s, $m, $h, $D, $M, $Y ) = gmtime($time);
- 
-@@ -121,14 +118,13 @@ SKIP: {
-             is( $h, $hour,     "timegm hour for @$_" );
-             is( $D, $mday,     "timegm day for @$_" );
-             is( $M, $mon,      "timegm month for @$_" );
--            is( $Y, $year,     "timegm year for @$_" );
-+            is( $Y, $year - 1900,     "timegm year for @$_" );
-         }
-     }
- }
- 
- for (@bad_time) {
-     my ( $year, $mon, $mday, $hour, $min, $sec ) = @$_;
--    $year -= 1900;
-     $mon--;
- 
-     eval { timegm( $sec, $min, $hour, $mday, $mon, $year ) };
-@@ -229,6 +225,30 @@ SKIP:
-     );
- }
- 
-+# 2-digit years
-+{
-+	my $current_year = ( localtime() )[5];
-+	my $pre_break    = ( $current_year + 49 ) - 100;
-+	my $break        = ( $current_year + 50 ) - 100;
-+	my $post_break   = ( $current_year + 51 ) - 100;
-+
-+	is(
-+		( ( localtime( timelocal( 0, 0, 0, 1, 1, $pre_break ) ) )[5] ),
-+		$pre_break + 100,
-+		"year $pre_break is treated as next century",
-+	);
-+	is(
-+		( ( localtime( timelocal( 0, 0, 0, 1, 1, $break ) ) )[5] ),
-+		$break + 100,
-+		"year $break is treated as next century",
-+	);
-+	is(
-+		( ( localtime( timelocal( 0, 0, 0, 1, 1, $post_break ) ) )[5] ),
-+		$post_break,
-+		"year $post_break is treated as current century",
-+	);
-+}
-+
- SKIP:
- {
-     skip 'These tests only run for the package maintainer.', 8
-diff --git a/hints/linux.sh b/hints/linux.sh
-index a985a8e..8cbe7dc 100644
---- a/hints/linux.sh
-+++ b/hints/linux.sh
-@@ -165,6 +165,9 @@ esac
- # plibpth to bypass this check.
- if [ -x /usr/bin/gcc ] ; then
-     gcc=/usr/bin/gcc
-+# clang also provides -print-search-dirs
-+elif ${cc:-cc} --version 2>/dev/null | grep -q '^clang ' ; then
-+    gcc=${cc:-cc}
- else
-     gcc=gcc
- fi
diff --git a/5.028.002-slim-stretch/Dockerfile b/5.028.002-slim-stretch/Dockerfile
deleted file mode 100644
index 6149a0d..0000000
--- a/5.028.002-slim-stretch/Dockerfile
+++ /dev/null
@@ -1,53 +0,0 @@
-FROM debian:stretch-slim
-LABEL maintainer="Peter Martini <PeterCMartini@GMail.com>, Zak B. Elep <zakame@cpan.org>"
-
-COPY *.patch /usr/src/perl/
-WORKDIR /usr/src/perl
-
-RUN apt-get update \
-    && apt-get install -y --no-install-recommends \
-       bzip2 \
-       ca-certificates \
-       # cpio \
-       curl \
-       dpkg-dev \
-       # file \
-       gcc \
-       # g++ \
-       # libbz2-dev \
-       # libdb-dev \
-       libc6-dev \
-       # libgdbm-dev \
-       # liblzma-dev \
-       make \
-       netbase \
-       patch \
-       # procps \
-       # zlib1g-dev \
-       xz-utils \
-    && curl -SL https://www.cpan.org/src/5.0/perl-5.28.2.tar.xz -o perl-5.28.2.tar.xz \
-    && echo '0b0189bfa4b2da20e899b4bdd746ac402e8f746a58e4fcf5516484157f2aab07 *perl-5.28.2.tar.xz' | sha256sum -c - \
-    && tar --strip-components=1 -xaf perl-5.28.2.tar.xz -C /usr/src/perl \
-    && rm perl-5.28.2.tar.xz \
-    && cat *.patch | patch -p1 \
-    && gnuArch="$(dpkg-architecture --query DEB_BUILD_GNU_TYPE)" \
-    && archBits="$(dpkg-architecture --query DEB_BUILD_ARCH_BITS)" \
-    && archFlag="$([ "$archBits" = '64' ] && echo '-Duse64bitall' || echo '-Duse64bitint')" \
-    && ./Configure -Darchname="$gnuArch" "$archFlag" -Duseshrplib -Dvendorprefix=/usr/local  -des \
-    && make -j$(nproc) \
-    && TEST_JOBS=$(nproc) make test_harness \
-    && make install \
-    && cd /usr/src \
-    && curl -LO https://www.cpan.org/authors/id/M/MI/MIYAGAWA/App-cpanminus-1.7044.tar.gz \
-    && echo '9b60767fe40752ef7a9d3f13f19060a63389a5c23acc3e9827e19b75500f81f3 *App-cpanminus-1.7044.tar.gz' | sha256sum -c - \
-    && tar -xzf App-cpanminus-1.7044.tar.gz && cd App-cpanminus-1.7044 && perl bin/cpanm . && cd /root \
-    && savedPackages="make netbase" \
-    && apt-mark auto '.*' > /dev/null \
-    && apt-mark manual $savedPackages \
-    && apt-get purge -y --auto-remove -o APT::AutoRemove::RecommendsImportant=false \
-    && rm -fr /var/cache/apt/* /var/lib/apt/lists/* \
-    && rm -fr ./cpanm /root/.cpanm /usr/src/perl /usr/src/App-cpanminus-1.7044* /tmp/*
-
-WORKDIR /
-
-CMD ["perl5.28.2","-de0"]
diff --git a/5.030.002-main,threaded-buster/DevelPatchPerl.patch b/5.030.002-main,threaded-buster/DevelPatchPerl.patch
deleted file mode 100644
index 11fdab0..0000000
--- a/5.030.002-main,threaded-buster/DevelPatchPerl.patch
+++ /dev/null
@@ -1,14 +0,0 @@
-diff --git a/hints/linux.sh b/hints/linux.sh
-index a985a8e..8cbe7dc 100644
---- a/hints/linux.sh
-+++ b/hints/linux.sh
-@@ -165,6 +165,9 @@ esac
- # plibpth to bypass this check.
- if [ -x /usr/bin/gcc ] ; then
-     gcc=/usr/bin/gcc
-+# clang also provides -print-search-dirs
-+elif ${cc:-cc} --version 2>/dev/null | grep -q '^clang ' ; then
-+    gcc=${cc:-cc}
- else
-     gcc=gcc
- fi
diff --git a/5.030.002-main,threaded-buster/Dockerfile b/5.030.002-main,threaded-buster/Dockerfile
deleted file mode 100644
index 78af7b5..0000000
--- a/5.030.002-main,threaded-buster/Dockerfile
+++ /dev/null
@@ -1,29 +0,0 @@
-FROM buildpack-deps:buster
-LABEL maintainer="Peter Martini <PeterCMartini@GMail.com>, Zak B. Elep <zakame@cpan.org>"
-
-COPY *.patch /usr/src/perl/
-WORKDIR /usr/src/perl
-
-RUN true \
-    && curl -SL https://www.cpan.org/src/5.0/perl-5.30.2.tar.xz -o perl-5.30.2.tar.xz \
-    && echo 'a1aa88bd6fbbdc2e82938afbb76c408b0ea847317737b712dc196cc7907a5259 *perl-5.30.2.tar.xz' | sha256sum -c - \
-    && tar --strip-components=1 -xaf perl-5.30.2.tar.xz -C /usr/src/perl \
-    && rm perl-5.30.2.tar.xz \
-    && cat *.patch | patch -p1 \
-    && gnuArch="$(dpkg-architecture --query DEB_BUILD_GNU_TYPE)" \
-    && archBits="$(dpkg-architecture --query DEB_BUILD_ARCH_BITS)" \
-    && archFlag="$([ "$archBits" = '64' ] && echo '-Duse64bitall' || echo '-Duse64bitint')" \
-    && ./Configure -Darchname="$gnuArch" "$archFlag" -Dusethreads -Duseshrplib -Dvendorprefix=/usr/local  -des \
-    && make -j$(nproc) \
-    && TEST_JOBS=$(nproc) make test_harness \
-    && make install \
-    && cd /usr/src \
-    && curl -LO https://www.cpan.org/authors/id/M/MI/MIYAGAWA/App-cpanminus-1.7044.tar.gz \
-    && echo '9b60767fe40752ef7a9d3f13f19060a63389a5c23acc3e9827e19b75500f81f3 *App-cpanminus-1.7044.tar.gz' | sha256sum -c - \
-    && tar -xzf App-cpanminus-1.7044.tar.gz && cd App-cpanminus-1.7044 && perl bin/cpanm . && cd /root \
-    && true \
-    && rm -fr ./cpanm /root/.cpanm /usr/src/perl /usr/src/App-cpanminus-1.7044* /tmp/*
-
-WORKDIR /
-
-CMD ["perl5.30.2","-de0"]
diff --git a/5.030.002-main,threaded-stretch/DevelPatchPerl.patch b/5.030.002-main,threaded-stretch/DevelPatchPerl.patch
deleted file mode 100644
index 11fdab0..0000000
--- a/5.030.002-main,threaded-stretch/DevelPatchPerl.patch
+++ /dev/null
@@ -1,14 +0,0 @@
-diff --git a/hints/linux.sh b/hints/linux.sh
-index a985a8e..8cbe7dc 100644
---- a/hints/linux.sh
-+++ b/hints/linux.sh
-@@ -165,6 +165,9 @@ esac
- # plibpth to bypass this check.
- if [ -x /usr/bin/gcc ] ; then
-     gcc=/usr/bin/gcc
-+# clang also provides -print-search-dirs
-+elif ${cc:-cc} --version 2>/dev/null | grep -q '^clang ' ; then
-+    gcc=${cc:-cc}
- else
-     gcc=gcc
- fi
diff --git a/5.030.002-main,threaded-stretch/Dockerfile b/5.030.002-main,threaded-stretch/Dockerfile
deleted file mode 100644
index 344bdf2..0000000
--- a/5.030.002-main,threaded-stretch/Dockerfile
+++ /dev/null
@@ -1,29 +0,0 @@
-FROM buildpack-deps:stretch
-LABEL maintainer="Peter Martini <PeterCMartini@GMail.com>, Zak B. Elep <zakame@cpan.org>"
-
-COPY *.patch /usr/src/perl/
-WORKDIR /usr/src/perl
-
-RUN true \
-    && curl -SL https://www.cpan.org/src/5.0/perl-5.30.2.tar.xz -o perl-5.30.2.tar.xz \
-    && echo 'a1aa88bd6fbbdc2e82938afbb76c408b0ea847317737b712dc196cc7907a5259 *perl-5.30.2.tar.xz' | sha256sum -c - \
-    && tar --strip-components=1 -xaf perl-5.30.2.tar.xz -C /usr/src/perl \
-    && rm perl-5.30.2.tar.xz \
-    && cat *.patch | patch -p1 \
-    && gnuArch="$(dpkg-architecture --query DEB_BUILD_GNU_TYPE)" \
-    && archBits="$(dpkg-architecture --query DEB_BUILD_ARCH_BITS)" \
-    && archFlag="$([ "$archBits" = '64' ] && echo '-Duse64bitall' || echo '-Duse64bitint')" \
-    && ./Configure -Darchname="$gnuArch" "$archFlag" -Dusethreads -Duseshrplib -Dvendorprefix=/usr/local  -des \
-    && make -j$(nproc) \
-    && TEST_JOBS=$(nproc) make test_harness \
-    && make install \
-    && cd /usr/src \
-    && curl -LO https://www.cpan.org/authors/id/M/MI/MIYAGAWA/App-cpanminus-1.7044.tar.gz \
-    && echo '9b60767fe40752ef7a9d3f13f19060a63389a5c23acc3e9827e19b75500f81f3 *App-cpanminus-1.7044.tar.gz' | sha256sum -c - \
-    && tar -xzf App-cpanminus-1.7044.tar.gz && cd App-cpanminus-1.7044 && perl bin/cpanm . && cd /root \
-    && true \
-    && rm -fr ./cpanm /root/.cpanm /usr/src/perl /usr/src/App-cpanminus-1.7044* /tmp/*
-
-WORKDIR /
-
-CMD ["perl5.30.2","-de0"]
diff --git a/5.030.002-main-buster/DevelPatchPerl.patch b/5.030.002-main-buster/DevelPatchPerl.patch
deleted file mode 100644
index 11fdab0..0000000
--- a/5.030.002-main-buster/DevelPatchPerl.patch
+++ /dev/null
@@ -1,14 +0,0 @@
-diff --git a/hints/linux.sh b/hints/linux.sh
-index a985a8e..8cbe7dc 100644
---- a/hints/linux.sh
-+++ b/hints/linux.sh
-@@ -165,6 +165,9 @@ esac
- # plibpth to bypass this check.
- if [ -x /usr/bin/gcc ] ; then
-     gcc=/usr/bin/gcc
-+# clang also provides -print-search-dirs
-+elif ${cc:-cc} --version 2>/dev/null | grep -q '^clang ' ; then
-+    gcc=${cc:-cc}
- else
-     gcc=gcc
- fi
diff --git a/5.030.002-main-buster/Dockerfile b/5.030.002-main-buster/Dockerfile
deleted file mode 100644
index 2287b84..0000000
--- a/5.030.002-main-buster/Dockerfile
+++ /dev/null
@@ -1,29 +0,0 @@
-FROM buildpack-deps:buster
-LABEL maintainer="Peter Martini <PeterCMartini@GMail.com>, Zak B. Elep <zakame@cpan.org>"
-
-COPY *.patch /usr/src/perl/
-WORKDIR /usr/src/perl
-
-RUN true \
-    && curl -SL https://www.cpan.org/src/5.0/perl-5.30.2.tar.xz -o perl-5.30.2.tar.xz \
-    && echo 'a1aa88bd6fbbdc2e82938afbb76c408b0ea847317737b712dc196cc7907a5259 *perl-5.30.2.tar.xz' | sha256sum -c - \
-    && tar --strip-components=1 -xaf perl-5.30.2.tar.xz -C /usr/src/perl \
-    && rm perl-5.30.2.tar.xz \
-    && cat *.patch | patch -p1 \
-    && gnuArch="$(dpkg-architecture --query DEB_BUILD_GNU_TYPE)" \
-    && archBits="$(dpkg-architecture --query DEB_BUILD_ARCH_BITS)" \
-    && archFlag="$([ "$archBits" = '64' ] && echo '-Duse64bitall' || echo '-Duse64bitint')" \
-    && ./Configure -Darchname="$gnuArch" "$archFlag" -Duseshrplib -Dvendorprefix=/usr/local  -des \
-    && make -j$(nproc) \
-    && TEST_JOBS=$(nproc) make test_harness \
-    && make install \
-    && cd /usr/src \
-    && curl -LO https://www.cpan.org/authors/id/M/MI/MIYAGAWA/App-cpanminus-1.7044.tar.gz \
-    && echo '9b60767fe40752ef7a9d3f13f19060a63389a5c23acc3e9827e19b75500f81f3 *App-cpanminus-1.7044.tar.gz' | sha256sum -c - \
-    && tar -xzf App-cpanminus-1.7044.tar.gz && cd App-cpanminus-1.7044 && perl bin/cpanm . && cd /root \
-    && true \
-    && rm -fr ./cpanm /root/.cpanm /usr/src/perl /usr/src/App-cpanminus-1.7044* /tmp/*
-
-WORKDIR /
-
-CMD ["perl5.30.2","-de0"]
diff --git a/5.030.002-main-stretch/DevelPatchPerl.patch b/5.030.002-main-stretch/DevelPatchPerl.patch
deleted file mode 100644
index 11fdab0..0000000
--- a/5.030.002-main-stretch/DevelPatchPerl.patch
+++ /dev/null
@@ -1,14 +0,0 @@
-diff --git a/hints/linux.sh b/hints/linux.sh
-index a985a8e..8cbe7dc 100644
---- a/hints/linux.sh
-+++ b/hints/linux.sh
-@@ -165,6 +165,9 @@ esac
- # plibpth to bypass this check.
- if [ -x /usr/bin/gcc ] ; then
-     gcc=/usr/bin/gcc
-+# clang also provides -print-search-dirs
-+elif ${cc:-cc} --version 2>/dev/null | grep -q '^clang ' ; then
-+    gcc=${cc:-cc}
- else
-     gcc=gcc
- fi
diff --git a/5.030.002-main-stretch/Dockerfile b/5.030.002-main-stretch/Dockerfile
deleted file mode 100644
index 66ab04a..0000000
--- a/5.030.002-main-stretch/Dockerfile
+++ /dev/null
@@ -1,29 +0,0 @@
-FROM buildpack-deps:stretch
-LABEL maintainer="Peter Martini <PeterCMartini@GMail.com>, Zak B. Elep <zakame@cpan.org>"
-
-COPY *.patch /usr/src/perl/
-WORKDIR /usr/src/perl
-
-RUN true \
-    && curl -SL https://www.cpan.org/src/5.0/perl-5.30.2.tar.xz -o perl-5.30.2.tar.xz \
-    && echo 'a1aa88bd6fbbdc2e82938afbb76c408b0ea847317737b712dc196cc7907a5259 *perl-5.30.2.tar.xz' | sha256sum -c - \
-    && tar --strip-components=1 -xaf perl-5.30.2.tar.xz -C /usr/src/perl \
-    && rm perl-5.30.2.tar.xz \
-    && cat *.patch | patch -p1 \
-    && gnuArch="$(dpkg-architecture --query DEB_BUILD_GNU_TYPE)" \
-    && archBits="$(dpkg-architecture --query DEB_BUILD_ARCH_BITS)" \
-    && archFlag="$([ "$archBits" = '64' ] && echo '-Duse64bitall' || echo '-Duse64bitint')" \
-    && ./Configure -Darchname="$gnuArch" "$archFlag" -Duseshrplib -Dvendorprefix=/usr/local  -des \
-    && make -j$(nproc) \
-    && TEST_JOBS=$(nproc) make test_harness \
-    && make install \
-    && cd /usr/src \
-    && curl -LO https://www.cpan.org/authors/id/M/MI/MIYAGAWA/App-cpanminus-1.7044.tar.gz \
-    && echo '9b60767fe40752ef7a9d3f13f19060a63389a5c23acc3e9827e19b75500f81f3 *App-cpanminus-1.7044.tar.gz' | sha256sum -c - \
-    && tar -xzf App-cpanminus-1.7044.tar.gz && cd App-cpanminus-1.7044 && perl bin/cpanm . && cd /root \
-    && true \
-    && rm -fr ./cpanm /root/.cpanm /usr/src/perl /usr/src/App-cpanminus-1.7044* /tmp/*
-
-WORKDIR /
-
-CMD ["perl5.30.2","-de0"]
diff --git a/5.030.002-slim,threaded-buster/DevelPatchPerl.patch b/5.030.002-slim,threaded-buster/DevelPatchPerl.patch
deleted file mode 100644
index 11fdab0..0000000
--- a/5.030.002-slim,threaded-buster/DevelPatchPerl.patch
+++ /dev/null
@@ -1,14 +0,0 @@
-diff --git a/hints/linux.sh b/hints/linux.sh
-index a985a8e..8cbe7dc 100644
---- a/hints/linux.sh
-+++ b/hints/linux.sh
-@@ -165,6 +165,9 @@ esac
- # plibpth to bypass this check.
- if [ -x /usr/bin/gcc ] ; then
-     gcc=/usr/bin/gcc
-+# clang also provides -print-search-dirs
-+elif ${cc:-cc} --version 2>/dev/null | grep -q '^clang ' ; then
-+    gcc=${cc:-cc}
- else
-     gcc=gcc
- fi
diff --git a/5.030.002-slim,threaded-buster/Dockerfile b/5.030.002-slim,threaded-buster/Dockerfile
deleted file mode 100644
index d5684d0..0000000
--- a/5.030.002-slim,threaded-buster/Dockerfile
+++ /dev/null
@@ -1,53 +0,0 @@
-FROM debian:buster-slim
-LABEL maintainer="Peter Martini <PeterCMartini@GMail.com>, Zak B. Elep <zakame@cpan.org>"
-
-COPY *.patch /usr/src/perl/
-WORKDIR /usr/src/perl
-
-RUN apt-get update \
-    && apt-get install -y --no-install-recommends \
-       bzip2 \
-       ca-certificates \
-       # cpio \
-       curl \
-       dpkg-dev \
-       # file \
-       gcc \
-       # g++ \
-       # libbz2-dev \
-       # libdb-dev \
-       libc6-dev \
-       # libgdbm-dev \
-       # liblzma-dev \
-       make \
-       netbase \
-       patch \
-       # procps \
-       # zlib1g-dev \
-       xz-utils \
-    && curl -SL https://www.cpan.org/src/5.0/perl-5.30.2.tar.xz -o perl-5.30.2.tar.xz \
-    && echo 'a1aa88bd6fbbdc2e82938afbb76c408b0ea847317737b712dc196cc7907a5259 *perl-5.30.2.tar.xz' | sha256sum -c - \
-    && tar --strip-components=1 -xaf perl-5.30.2.tar.xz -C /usr/src/perl \
-    && rm perl-5.30.2.tar.xz \
-    && cat *.patch | patch -p1 \
-    && gnuArch="$(dpkg-architecture --query DEB_BUILD_GNU_TYPE)" \
-    && archBits="$(dpkg-architecture --query DEB_BUILD_ARCH_BITS)" \
-    && archFlag="$([ "$archBits" = '64' ] && echo '-Duse64bitall' || echo '-Duse64bitint')" \
-    && ./Configure -Darchname="$gnuArch" "$archFlag" -Dusethreads -Duseshrplib -Dvendorprefix=/usr/local  -des \
-    && make -j$(nproc) \
-    && TEST_JOBS=$(nproc) make test_harness \
-    && make install \
-    && cd /usr/src \
-    && curl -LO https://www.cpan.org/authors/id/M/MI/MIYAGAWA/App-cpanminus-1.7044.tar.gz \
-    && echo '9b60767fe40752ef7a9d3f13f19060a63389a5c23acc3e9827e19b75500f81f3 *App-cpanminus-1.7044.tar.gz' | sha256sum -c - \
-    && tar -xzf App-cpanminus-1.7044.tar.gz && cd App-cpanminus-1.7044 && perl bin/cpanm . && cd /root \
-    && savedPackages="make netbase" \
-    && apt-mark auto '.*' > /dev/null \
-    && apt-mark manual $savedPackages \
-    && apt-get purge -y --auto-remove -o APT::AutoRemove::RecommendsImportant=false \
-    && rm -fr /var/cache/apt/* /var/lib/apt/lists/* \
-    && rm -fr ./cpanm /root/.cpanm /usr/src/perl /usr/src/App-cpanminus-1.7044* /tmp/*
-
-WORKDIR /
-
-CMD ["perl5.30.2","-de0"]
diff --git a/5.030.002-slim,threaded-stretch/DevelPatchPerl.patch b/5.030.002-slim,threaded-stretch/DevelPatchPerl.patch
deleted file mode 100644
index 11fdab0..0000000
--- a/5.030.002-slim,threaded-stretch/DevelPatchPerl.patch
+++ /dev/null
@@ -1,14 +0,0 @@
-diff --git a/hints/linux.sh b/hints/linux.sh
-index a985a8e..8cbe7dc 100644
---- a/hints/linux.sh
-+++ b/hints/linux.sh
-@@ -165,6 +165,9 @@ esac
- # plibpth to bypass this check.
- if [ -x /usr/bin/gcc ] ; then
-     gcc=/usr/bin/gcc
-+# clang also provides -print-search-dirs
-+elif ${cc:-cc} --version 2>/dev/null | grep -q '^clang ' ; then
-+    gcc=${cc:-cc}
- else
-     gcc=gcc
- fi
diff --git a/5.030.002-slim,threaded-stretch/Dockerfile b/5.030.002-slim,threaded-stretch/Dockerfile
deleted file mode 100644
index 34066be..0000000
--- a/5.030.002-slim,threaded-stretch/Dockerfile
+++ /dev/null
@@ -1,53 +0,0 @@
-FROM debian:stretch-slim
-LABEL maintainer="Peter Martini <PeterCMartini@GMail.com>, Zak B. Elep <zakame@cpan.org>"
-
-COPY *.patch /usr/src/perl/
-WORKDIR /usr/src/perl
-
-RUN apt-get update \
-    && apt-get install -y --no-install-recommends \
-       bzip2 \
-       ca-certificates \
-       # cpio \
-       curl \
-       dpkg-dev \
-       # file \
-       gcc \
-       # g++ \
-       # libbz2-dev \
-       # libdb-dev \
-       libc6-dev \
-       # libgdbm-dev \
-       # liblzma-dev \
-       make \
-       netbase \
-       patch \
-       # procps \
-       # zlib1g-dev \
-       xz-utils \
-    && curl -SL https://www.cpan.org/src/5.0/perl-5.30.2.tar.xz -o perl-5.30.2.tar.xz \
-    && echo 'a1aa88bd6fbbdc2e82938afbb76c408b0ea847317737b712dc196cc7907a5259 *perl-5.30.2.tar.xz' | sha256sum -c - \
-    && tar --strip-components=1 -xaf perl-5.30.2.tar.xz -C /usr/src/perl \
-    && rm perl-5.30.2.tar.xz \
-    && cat *.patch | patch -p1 \
-    && gnuArch="$(dpkg-architecture --query DEB_BUILD_GNU_TYPE)" \
-    && archBits="$(dpkg-architecture --query DEB_BUILD_ARCH_BITS)" \
-    && archFlag="$([ "$archBits" = '64' ] && echo '-Duse64bitall' || echo '-Duse64bitint')" \
-    && ./Configure -Darchname="$gnuArch" "$archFlag" -Dusethreads -Duseshrplib -Dvendorprefix=/usr/local  -des \
-    && make -j$(nproc) \
-    && TEST_JOBS=$(nproc) make test_harness \
-    && make install \
-    && cd /usr/src \
-    && curl -LO https://www.cpan.org/authors/id/M/MI/MIYAGAWA/App-cpanminus-1.7044.tar.gz \
-    && echo '9b60767fe40752ef7a9d3f13f19060a63389a5c23acc3e9827e19b75500f81f3 *App-cpanminus-1.7044.tar.gz' | sha256sum -c - \
-    && tar -xzf App-cpanminus-1.7044.tar.gz && cd App-cpanminus-1.7044 && perl bin/cpanm . && cd /root \
-    && savedPackages="make netbase" \
-    && apt-mark auto '.*' > /dev/null \
-    && apt-mark manual $savedPackages \
-    && apt-get purge -y --auto-remove -o APT::AutoRemove::RecommendsImportant=false \
-    && rm -fr /var/cache/apt/* /var/lib/apt/lists/* \
-    && rm -fr ./cpanm /root/.cpanm /usr/src/perl /usr/src/App-cpanminus-1.7044* /tmp/*
-
-WORKDIR /
-
-CMD ["perl5.30.2","-de0"]
diff --git a/5.030.002-slim-buster/DevelPatchPerl.patch b/5.030.002-slim-buster/DevelPatchPerl.patch
deleted file mode 100644
index 11fdab0..0000000
--- a/5.030.002-slim-buster/DevelPatchPerl.patch
+++ /dev/null
@@ -1,14 +0,0 @@
-diff --git a/hints/linux.sh b/hints/linux.sh
-index a985a8e..8cbe7dc 100644
---- a/hints/linux.sh
-+++ b/hints/linux.sh
-@@ -165,6 +165,9 @@ esac
- # plibpth to bypass this check.
- if [ -x /usr/bin/gcc ] ; then
-     gcc=/usr/bin/gcc
-+# clang also provides -print-search-dirs
-+elif ${cc:-cc} --version 2>/dev/null | grep -q '^clang ' ; then
-+    gcc=${cc:-cc}
- else
-     gcc=gcc
- fi
diff --git a/5.030.002-slim-buster/Dockerfile b/5.030.002-slim-buster/Dockerfile
deleted file mode 100644
index e786d46..0000000
--- a/5.030.002-slim-buster/Dockerfile
+++ /dev/null
@@ -1,53 +0,0 @@
-FROM debian:buster-slim
-LABEL maintainer="Peter Martini <PeterCMartini@GMail.com>, Zak B. Elep <zakame@cpan.org>"
-
-COPY *.patch /usr/src/perl/
-WORKDIR /usr/src/perl
-
-RUN apt-get update \
-    && apt-get install -y --no-install-recommends \
-       bzip2 \
-       ca-certificates \
-       # cpio \
-       curl \
-       dpkg-dev \
-       # file \
-       gcc \
-       # g++ \
-       # libbz2-dev \
-       # libdb-dev \
-       libc6-dev \
-       # libgdbm-dev \
-       # liblzma-dev \
-       make \
-       netbase \
-       patch \
-       # procps \
-       # zlib1g-dev \
-       xz-utils \
-    && curl -SL https://www.cpan.org/src/5.0/perl-5.30.2.tar.xz -o perl-5.30.2.tar.xz \
-    && echo 'a1aa88bd6fbbdc2e82938afbb76c408b0ea847317737b712dc196cc7907a5259 *perl-5.30.2.tar.xz' | sha256sum -c - \
-    && tar --strip-components=1 -xaf perl-5.30.2.tar.xz -C /usr/src/perl \
-    && rm perl-5.30.2.tar.xz \
-    && cat *.patch | patch -p1 \
-    && gnuArch="$(dpkg-architecture --query DEB_BUILD_GNU_TYPE)" \
-    && archBits="$(dpkg-architecture --query DEB_BUILD_ARCH_BITS)" \
-    && archFlag="$([ "$archBits" = '64' ] && echo '-Duse64bitall' || echo '-Duse64bitint')" \
-    && ./Configure -Darchname="$gnuArch" "$archFlag" -Duseshrplib -Dvendorprefix=/usr/local  -des \
-    && make -j$(nproc) \
-    && TEST_JOBS=$(nproc) make test_harness \
-    && make install \
-    && cd /usr/src \
-    && curl -LO https://www.cpan.org/authors/id/M/MI/MIYAGAWA/App-cpanminus-1.7044.tar.gz \
-    && echo '9b60767fe40752ef7a9d3f13f19060a63389a5c23acc3e9827e19b75500f81f3 *App-cpanminus-1.7044.tar.gz' | sha256sum -c - \
-    && tar -xzf App-cpanminus-1.7044.tar.gz && cd App-cpanminus-1.7044 && perl bin/cpanm . && cd /root \
-    && savedPackages="make netbase" \
-    && apt-mark auto '.*' > /dev/null \
-    && apt-mark manual $savedPackages \
-    && apt-get purge -y --auto-remove -o APT::AutoRemove::RecommendsImportant=false \
-    && rm -fr /var/cache/apt/* /var/lib/apt/lists/* \
-    && rm -fr ./cpanm /root/.cpanm /usr/src/perl /usr/src/App-cpanminus-1.7044* /tmp/*
-
-WORKDIR /
-
-CMD ["perl5.30.2","-de0"]
diff --git a/5.030.002-slim-stretch/DevelPatchPerl.patch b/5.030.002-slim-stretch/DevelPatchPerl.patch
deleted file mode 100644
index 11fdab0..0000000
--- a/5.030.002-slim-stretch/DevelPatchPerl.patch
+++ /dev/null
@@ -1,14 +0,0 @@
-diff --git a/hints/linux.sh b/hints/linux.sh
-index a985a8e..8cbe7dc 100644
---- a/hints/linux.sh
-+++ b/hints/linux.sh
-@@ -165,6 +165,9 @@ esac
- # plibpth to bypass this check.
- if [ -x /usr/bin/gcc ] ; then
-     gcc=/usr/bin/gcc
-+# clang also provides -print-search-dirs
-+elif ${cc:-cc} --version 2>/dev/null | grep -q '^clang ' ; then
-+    gcc=${cc:-cc}
- else
-     gcc=gcc
- fi
diff --git a/5.030.002-slim-stretch/Dockerfile b/5.030.002-slim-stretch/Dockerfile
deleted file mode 100644
index bdf4389..0000000
--- a/5.030.002-slim-stretch/Dockerfile
+++ /dev/null
@@ -1,53 +0,0 @@
-FROM debian:stretch-slim
-LABEL maintainer="Peter Martini <PeterCMartini@GMail.com>, Zak B. Elep <zakame@cpan.org>"
-
-COPY *.patch /usr/src/perl/
-WORKDIR /usr/src/perl
-
-RUN apt-get update \
-    && apt-get install -y --no-install-recommends \
-       bzip2 \
-       ca-certificates \
-       # cpio \
-       curl \
-       dpkg-dev \
-       # file \
-       gcc \
-       # g++ \
-       # libbz2-dev \
-       # libdb-dev \
-       libc6-dev \
-       # libgdbm-dev \
-       # liblzma-dev \
-       make \
-       netbase \
-       patch \
-       # procps \
-       # zlib1g-dev \
-       xz-utils \
-    && curl -SL https://www.cpan.org/src/5.0/perl-5.30.2.tar.xz -o perl-5.30.2.tar.xz \
-    && echo 'a1aa88bd6fbbdc2e82938afbb76c408b0ea847317737b712dc196cc7907a5259 *perl-5.30.2.tar.xz' | sha256sum -c - \
-    && tar --strip-components=1 -xaf perl-5.30.2.tar.xz -C /usr/src/perl \
-    && rm perl-5.30.2.tar.xz \
-    && cat *.patch | patch -p1 \
-    && gnuArch="$(dpkg-architecture --query DEB_BUILD_GNU_TYPE)" \
-    && archBits="$(dpkg-architecture --query DEB_BUILD_ARCH_BITS)" \
-    && archFlag="$([ "$archBits" = '64' ] && echo '-Duse64bitall' || echo '-Duse64bitint')" \
-    && ./Configure -Darchname="$gnuArch" "$archFlag" -Duseshrplib -Dvendorprefix=/usr/local  -des \
-    && make -j$(nproc) \
-    && TEST_JOBS=$(nproc) make test_harness \
-    && make install \
-    && cd /usr/src \
-    && curl -LO https://www.cpan.org/authors/id/M/MI/MIYAGAWA/App-cpanminus-1.7044.tar.gz \
-    && echo '9b60767fe40752ef7a9d3f13f19060a63389a5c23acc3e9827e19b75500f81f3 *App-cpanminus-1.7044.tar.gz' | sha256sum -c - \
-    && tar -xzf App-cpanminus-1.7044.tar.gz && cd App-cpanminus-1.7044 && perl bin/cpanm . && cd /root \
-    && savedPackages="make netbase" \
-    && apt-mark auto '.*' > /dev/null \
-    && apt-mark manual $savedPackages \
-    && apt-get purge -y --auto-remove -o APT::AutoRemove::RecommendsImportant=false \
-    && rm -fr /var/cache/apt/* /var/lib/apt/lists/* \
-    && rm -fr ./cpanm /root/.cpanm /usr/src/perl /usr/src/App-cpanminus-1.7044* /tmp/*
-
-WORKDIR /
-
-CMD ["perl5.30.2","-de0"]