In build-perl-modules.pl, the check:

        unless (-x $perlBinary) {
                die "Couldn't find a perl binary. Exiting.\n";
        }

is incorrect.  If a user enters a directory such as /usr/bin, the test 
incorrectly succeeds (since directories are typically executatable).  This 
actually happened in thread http://forums.slimdevices.com/showthread.php?
p=61572#post61572 .

The test should evaluate that perlBinary is a regular file as well:

        unless (-f $perlBinary && -x $perlBinary) {
                die "Couldn't find a perl binary. Exiting.\n";
        }

Can someone please update and commit the script?

Thanks