/home/cpanrun/build/5.6.1/bin/perl Build.PL 
Checking whether your kit is complete...
ERROR: Module::Build: Version 0.20 is installed, but we need version >= 0.21
WARNING: Astro::MoonPhase: Prerequisite Astro::MoonPhase isn't installed

   Astro::MoonPhase is only required if you want to display the phase
   of the moon on your calendars.  You need at least version 0.60.

   If you install Astro::MoonPhase later, you do NOT need to
   re-install PostScript::Calendar.

ERRORS/WARNINGS FOUND IN PREREQUISITES.  You may wish to install the versions
 of the modules indicated above before proceeding with this installation.

Looks good
Creating new 'Build' script for 'PostScript-Calendar' version '0.03'
/home/cpanrun/build/5.6.1/bin/perl Build
lib/PostScript/Calendar.pm -> blib/lib/PostScript/Calendar.pm
Manifying blib/lib/PostScript/Calendar.pm -> blib/libdoc/PostScript::Calendar.3
/home/cpanrun/build/5.6.1/bin/perl Build test
t/00.load...........# Testing PostScript::Calendar 0.03
ok
t/perlcritic........skipped: Test::Perl::Critic required for testing PBP compliance
t/pod-coverage......skipped: Test::Pod::Coverage 1.04 required for testing POD coverage
t/pod...............skipped: Test::Pod 1.14 required for testing POD
All tests successful, 3 tests skipped.
Files=4, Tests=1,  1 wallclock secs ( 0.86 cusr +  0.10 csys =  0.96 CPU)
/home/cpanrun/build/5.6.1/bin/perl Build install
Installing /home/cpanrun/build/5.6.1/lib/site_perl/5.6.1/PostScript/Calendar.pm
Installing /home/cpanrun/build/5.6.1/man/man3/PostScript::Calendar.3