$ cpanp -i Object::Signature
Installing Object::Signature (1.07)
Running [/usr/bin/perl /usr/bin/cpanp-run-perl /home/bened/.cpanplus/5.10.1/build/Object-Signature-1.07/Makefile.PL INSTALLDIRS=site]...
[ERROR] File '/home/bened/.cpanplus/5.10.1/build/Object-Signature-1.07/Makefile' is not readable or does not exist

Key 'file' (/home/bened/.cpanplus/5.10.1/build/Object-Signature-1.07/Makefile) is of invalid type for 'CPANPLUS::Dist::MM::_find_prereqs' provided by CPANPLUS::Dist::MM::prepare at /usr/share/perl/5.10/CPANPLUS/Module.pm line 815
[ERROR] Unable to scan '/home/bened/.cpanplus/5.10.1/build/Object-Signature-1.07/Makefile' for prereqs

[ERROR] Unable to create a new distribution object for 'Object::Signature' -- cannot continue

*** Install log written to:
  /home/bened/.cpanplus/install-logs/Object-Signature-1.07-1318467004.log

Error installing 'Object::Signature'
Problem installing one or more modules