Just as another answer my personal pmver shell function. Exits with error if any of the named modules aren't available.

pmver () {
        perl -le '$exit=0;for $f (@ARGV) { eval qq{require $f}; if( $@
+ =~ /locate (\S+)\.pm/ ) { print qq{$f not installed}; $exit=1;next} 
+print qq{$f: },${"${f}::VERSION"}||q{undefined}}exit $exit' "$@"
}
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Edit: Apt point below. Historically I've used this checking if/what CPAN stuff's installed so that was my expected failure mode WRT require. A more bullet proof version would probably report $@ in any failure (and/or use Try::Tiny).