It doesn't seem to install well on Windows:

http://matrix.cpantesters.org/?dist=Crypt-Random-Source+0.14

Some of the tests pass: http://www.cpantesters.org/cpan/report/7b56d230-6c00-1014-a145-4ff226dc57bc

So it's possible the module works enough for your purpose even despite the failing tests. You can use

cpanm --force Crypt::Random::Source

to force-install it, then see what happens.