This is how it goes:
# perl -MCPAN -e "CPAN::Shell->force(qw(install WWW::Curl::Easy));"
Going to read '/root/.cpan/Metadata'
Database was generated on Thu, 16 May 2013 10:08:05 GMT
Running install for module 'WWW::Curl::Easy'
Running make for S/SZ/SZBALINT/WWW-Curl-4.15.tar.gz
Checksum for /root/.cpan/sources/authors/id/S/SZ/SZBALINT/WWW-Curl-4.15.tar.gz ok
CPAN.pm: Going to build S/SZ/SZBALINT/WWW-Curl-4.15.tar.gz
Locating required external dependency bin:curl-config... missing.
Unresolvable missing external dependency.
Please install 'curl-config' seperately and try again.
NA: Unable to build distribution on this platform.
No 'Makefile' created SZBALINT/WWW-Curl-4.15.tar.gz
/usr/bin/perl Makefile.PL INSTALLDIRS=site -- 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 metadata file. Falling back to other methods to determine prerequisites