cpan[2]> install YAML
CPAN: Storable loaded ok (v2.20)
Going to read '/root/.cpan/Metadata'
  Database was generated on Tue, 15 Dec 2009 22:06:58 GMT
Running install for module 'YAML'
Running make for A/AD/ADAMK/YAML-0.70.tar.gz
CPAN: Digest::SHA loaded ok (v5.47)
CPAN: Compress::Zlib loaded ok (v2.023)
Checksum for /root/.cpan/sources/authors/id/A/AD/ADAMK/YAML-0.70.tar.gz ok
Scanning cache /root/.cpan/build for sizes
......................................................................------DONE
DEL(1/1): /root/.cpan/build/ExtUtils-CBuilder-0.27-7zCEl4
CPAN: Archive::Tar loaded ok (v1.52)
YAML-0.70/
YAML-0.70/Makefile.PL
YAML-0.70/META.yml
YAML-0.70/LICENSE
YAML-0.70/README
.............
YAML-0.70/lib/YAML/Loader.pm
YAML-0.70/lib/Test/
YAML-0.70/lib/Test/YAML.pm
CPAN: File::Temp loaded ok (v0.22)

  CPAN.pm: Going to build A/AD/ADAMK/YAML-0.70.tar.gz

ERROR: perl: Version 5.006001 is installed, but we need version >= 5.008 at inc/Module/Install/Makefile.pm line 119.
Warning: No success on command[/usr/bin/perl Makefile.PL]
Warning (usually harmless): 'YAML' not installed, will not store persistent state
  ADAMK/YAML-0.70.tar.gz
  /usr/bin/perl Makefile.PL -- NOT OK
Running make test
  Make had some problems, won't test
Running make install
  Make had some problems, won't install
Could not read '/root/.cpan/build/YAML-0.70-nFnsag/META.yml'. Falling back to other methods to determine prerequisites
Failed during this command:
 ADAMK/YAML-0.70.tar.gz                       : writemakefile NO '/usr/bin/perl Makefile.PL' returned status 7424