diff --git a/author/carton/Dockerfile b/author/carton/Dockerfile
index 86b423c9c..e4f98dd06 100644
--- a/author/carton/Dockerfile
+++ b/author/carton/Dockerfile
@@ -9,7 +9,9 @@ RUN curl --compressed -sSL https://raw.githubusercontent.com/tokuhirom/Perl-Buil
 RUN apk del perl patch
 
 ENV PATH=/opt/perl-5.8/bin:$PATH
-RUN curl --compressed -sSL https://cpanmin.us/ | perl - --notest Distribution::Metadata@0.06 App::FatPacker::Simple@0.09 Carton ExtUtils::PL2Bat
+RUN curl --compressed -sSL https://cpanmin.us/ \
+    | perl - --notest \
+    Carton ExtUtils::PL2Bat
 
 RUN mkdir -p /tmp/carton
 WORKDIR /tmp/carton
diff --git a/author/cpanm/cpanfile b/author/cpanm/cpanfile
index d9905f3eb..365fbadf4 100644
--- a/author/cpanm/cpanfile
+++ b/author/cpanm/cpanfile
@@ -28,6 +28,7 @@ requires 'HTTP::Tiny', '0.054';
 requires 'HTTP::Tinyish', '0.04';
 requires 'JSON::PP', '2';
 requires 'JSON::PP::Compat5006', '1.09';
+requires 'Module::Build::Tiny', '==0.047'; # 0.048 doesn't work on perl 5.8.
 requires 'Module::CPANfile';
 requires 'Module::CoreList';
 requires 'Module::Metadata';
diff --git a/author/cpm/Dockerfile b/author/cpm/Dockerfile
index 6c0736f6e..7ee61eaca 100644
--- a/author/cpm/Dockerfile
+++ b/author/cpm/Dockerfile
@@ -9,7 +9,9 @@ RUN curl --compressed -sSL https://raw.githubusercontent.com/tokuhirom/Perl-Buil
 RUN apk del perl patch
 
 ENV PATH=/opt/perl-5.8/bin:$PATH
-RUN curl --compressed -sSL https://cpanmin.us/ | perl - --notest Distribution::Metadata@0.06 App::FatPacker::Simple@0.09 Carton ExtUtils::PL2Bat
+RUN curl --compressed -sSL https://cpanmin.us/ \
+    | perl - --notest \
+    Carton ExtUtils::PL2Bat
 
 RUN mkdir -p /tmp/cpm
 WORKDIR /tmp/cpm
diff --git a/author/cpm/cpanfile b/author/cpm/cpanfile
index 8a5f26886..8d124d0dc 100644
--- a/author/cpm/cpanfile
+++ b/author/cpm/cpanfile
@@ -1,6 +1,6 @@
 requires 'perl', '5.006';
 requires "Devel::GlobalDestruction::XS";
-requires "Module::Build::Tiny";
+requires 'Module::Build::Tiny', '==0.047'; # 0.048 doesn't work on perl 5.8.
 requires 'CPAN::Meta::Requirements', '==2.140'; # 2.141 doesn't support perl 5.8.
 
 requires "App::cpm";