diff --git a/5.018.004-64bit,threaded/Dockerfile b/5.018.004-64bit,threaded/Dockerfile
index 2e8d9fa..5ed2a71 100644
--- a/5.018.004-64bit,threaded/Dockerfile
+++ b/5.018.004-64bit,threaded/Dockerfile
@@ -12,8 +12,7 @@ RUN curl -SL https://cpan.metacpan.org/authors/id/R/RJ/RJBS/perl-5.18.4.tar.bz2
     && tar --strip-components=1 -xjf perl-5.18.4.tar.bz2 -C /usr/src/perl \
     && rm perl-5.18.4.tar.bz2 /tmp/sha1.txt
 
-# ccflags=-fwrapv is needed for gcc 4.9, and added by Configure automatically in 5.20+
-RUN ./Configure -Dusethreads -A ccflags=-fwrapv -Duse64bitall -des \
+RUN ./Configure -Dusethreads -Duse64bitall -A ccflags=-fwrapv -des \
         && make -j$(nproc) \
         && TEST_JOBS=$(nproc) make test_harness \
         && make install \
diff --git a/5.018.004-64bit,threaded/sha1.txt b/5.018.004-64bit,threaded/sha1.txt
index bdf4327..b833c2d 100644
--- a/5.018.004-64bit,threaded/sha1.txt
+++ b/5.018.004-64bit,threaded/sha1.txt
@@ -1 +1 @@
-69c34558a0a939a7adbbc1de48c06ea418d81e27  perl-5.18.4.tar.bz2
+69c34558a0a939a7adbbc1de48c06ea418d81e27 perl-5.18.4.tar.bz2
diff --git a/5.018.004-64bit/Dockerfile b/5.018.004-64bit/Dockerfile
index b0ce047..efe58b1 100644
--- a/5.018.004-64bit/Dockerfile
+++ b/5.018.004-64bit/Dockerfile
@@ -12,7 +12,6 @@ RUN curl -SL https://cpan.metacpan.org/authors/id/R/RJ/RJBS/perl-5.18.4.tar.bz2
     && tar --strip-components=1 -xjf perl-5.18.4.tar.bz2 -C /usr/src/perl \
     && rm perl-5.18.4.tar.bz2 /tmp/sha1.txt
 
-# ccflags=-fwrapv is needed for gcc 4.9, and added by Configure automatically in 5.20+
 RUN ./Configure -Duse64bitall -A ccflags=-fwrapv -des \
         && make -j$(nproc) \
         && TEST_JOBS=$(nproc) make test_harness \
diff --git a/5.018.004-64bit/sha1.txt b/5.018.004-64bit/sha1.txt
index bdf4327..b833c2d 100644
--- a/5.018.004-64bit/sha1.txt
+++ b/5.018.004-64bit/sha1.txt
@@ -1 +1 @@
-69c34558a0a939a7adbbc1de48c06ea418d81e27  perl-5.18.4.tar.bz2
+69c34558a0a939a7adbbc1de48c06ea418d81e27 perl-5.18.4.tar.bz2
diff --git a/5.020.001-64bit,threaded/Dockerfile b/5.020.001-64bit,threaded/Dockerfile
index 5b4a6b4..5182d76 100644
--- a/5.020.001-64bit,threaded/Dockerfile
+++ b/5.020.001-64bit,threaded/Dockerfile
@@ -12,7 +12,7 @@ RUN curl -SL https://cpan.metacpan.org/authors/id/S/SH/SHAY/perl-5.20.1.tar.bz2
     && tar --strip-components=1 -xjf perl-5.20.1.tar.bz2 -C /usr/src/perl \
     && rm perl-5.20.1.tar.bz2 /tmp/sha1.txt
 
-RUN ./Configure -Dusethreads -Duse64bitall -des \
+RUN ./Configure -Dusethreads -Duse64bitall  -des \
         && make -j$(nproc) \
         && TEST_JOBS=$(nproc) make test_harness \
         && make install \
diff --git a/5.020.001-64bit,threaded/sha1.txt b/5.020.001-64bit,threaded/sha1.txt
index 0cc2c47..74a5466 100644
--- a/5.020.001-64bit,threaded/sha1.txt
+++ b/5.020.001-64bit,threaded/sha1.txt
@@ -1 +1 @@
-cd424d1520ba2686fe5d4422565aaf880e9467f6  perl-5.20.1.tar.bz2
+cd424d1520ba2686fe5d4422565aaf880e9467f6 perl-5.20.1.tar.bz2
diff --git a/5.020.001-64bit/Dockerfile b/5.020.001-64bit/Dockerfile
index c2ae79a..e14bfba 100644
--- a/5.020.001-64bit/Dockerfile
+++ b/5.020.001-64bit/Dockerfile
@@ -12,7 +12,7 @@ RUN curl -SL https://cpan.metacpan.org/authors/id/S/SH/SHAY/perl-5.20.1.tar.bz2
     && tar --strip-components=1 -xjf perl-5.20.1.tar.bz2 -C /usr/src/perl \
     && rm perl-5.20.1.tar.bz2 /tmp/sha1.txt
 
-RUN ./Configure -Duse64bitall -des \
+RUN ./Configure -Duse64bitall  -des \
         && make -j$(nproc) \
         && TEST_JOBS=$(nproc) make test_harness \
         && make install \
diff --git a/5.020.001-64bit/sha1.txt b/5.020.001-64bit/sha1.txt
index 0cc2c47..74a5466 100644
--- a/5.020.001-64bit/sha1.txt
+++ b/5.020.001-64bit/sha1.txt
@@ -1 +1 @@
-cd424d1520ba2686fe5d4422565aaf880e9467f6  perl-5.20.1.tar.bz2
+cd424d1520ba2686fe5d4422565aaf880e9467f6 perl-5.20.1.tar.bz2