I tried following the instructions for installing CPAN modules at this link:


However, when I try to install Devel::REPL, it fails.

Here is the log:

[user@machine] cpanm Devel::REPL
--> Working on Devel::REPL
Fetching http://www.cpan.org/authors/id/E/ET/ETHER/Devel-REPL-1.003025.tar.gz ... OK
==> Found dependencies: Module::Build::Tiny
--> Working on Module::Build::Tiny
Fetching http://www.cpan.org/authors/id/L/LE/LEONT/Module-Build-Tiny-0.036.tar.gz ... OK
==> Found dependencies: TAP::Harness::Env, ExtUtils::Helpers, ExtUtils::InstallPaths, ExtUtils::Config
--> Working on TAP::Harness::Env
Fetching http://www.cpan.org/authors/id/L/LE/LEONT/Test-Harness-3.30.tar.gz ... OK
Configuring Test-Harness-3.30 ... OK
Building and testing Test-Harness-3.30 ... OK
Successfully installed Test-Harness-3.30
--> Working on ExtUtils::Helpers
Fetching http://www.cpan.org/authors/id/L/LE/LEONT/ExtUtils-Helpers-0.022.tar.gz ... OK
Configuring ExtUtils-Helpers-0.022 ... OK
Building and testing ExtUtils-Helpers-0.022 ... OK
Successfully installed ExtUtils-Helpers-0.022
--> Working on ExtUtils::InstallPaths
Fetching http://www.cpan.org/authors/id/L/LE/LEONT/ExtUtils-InstallPaths-0.010.tar.gz ... OK
Configuring ExtUtils-InstallPaths-0.010 ... OK
==> Found dependencies: ExtUtils::Config
--> Working on ExtUtils::Config
Fetching http://www.cpan.org/authors/id/L/LE/LEONT/ExtUtils-Config-0.007.tar.gz ... OK
Configuring ExtUtils-Config-0.007 ... OK
Building and testing ExtUtils-Config-0.007 ... OK
Successfully installed ExtUtils-Config-0.007
! Installing the dependencies failed: Module 'ExtUtils::Config' is not installed
! Bailing out the installation for ExtUtils-InstallPaths-0.010.
! Installing the dependencies failed: Module 'TAP::Harness::Env' is not installed, Module 'ExtUtils::Helpers' is not installed, Module 'ExtUtils::InstallPaths' is not installed, Module 'ExtUtils::Config' is not installed
! Bailing out the installation for Module-Build-Tiny-0.036.
! Installing the dependencies failed: Module 'Module::Build::Tiny' is not installed
! Bailing out the installation for Devel-REPL-1.003025.
3 distributions installed

Output of sw_vers:

ProductName:    Mac OS X
ProductVersion: 10.9.5
BuildVersion:   13F1066
  • 1
    Could you edit in the question what version of OS X you run? – bmike Jun 6 '14 at 18:53


You will find installing a local copy of perl, separate from the one bundled with Mac OS X, will make your module installation easier.

Use perlbrew to install and manage a specific version of perl. This isolates your perl from OS X updates and changes which have caused multiple problems in the past:

curl -L http://install.perlbrew.pl | bash
perlbrew install perl-5.16.0
perlbrew switch perl-5.16.0

cpan minus

On your isolated copy, install cpan minus to reduce the memory cost of installing modules:

curl -L http://cpanmin.us | perl - App::cpanminus

Re-install Devel::REPL

With this done, try re-installing Devel::REPL using cpanm:

cpanm Devel::REPL

...or cpan:

perl -MCPAN -e 'install Devel::REPL'

You should find modules install with less problems and are no longer affected by system updates or changes in Apple's decisions towards perl on OS X.

  • 2
    +1 to installing your own, local copy of Perl. This, in the long run, is much saner than doing sudo cpanm ... as you'll control when and if Perl changes on your machine, not Apple's OS updates. If you're already using Homebrew you can install a local perl via it as well. – Ian C. Jun 6 '14 at 19:43

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