Checking if your kit is complete...
Looks good
Writing Makefile for Chemistry::Isotope
cp lib/Chemistry/Isotope.pm blib/lib/Chemistry/Isotope.pm
Manifying blib/man3/Chemistry::Isotope.3
PERL_DL_NONLAZY=1 /Users/cpanrun/build/5.10.0/bin/perl "-MExtUtils::Command::MM" "-e" "test_harness(1, 'blib/lib', 'blib/arch')" t/*.t
t/Isotope....1..6
ok 1 - 235U
ok 2 - 235C
ok 3 - 400, 180
ok 4 - 12C abundance
ok 5 - 13C abundance
ok 6 - Xyz abundance
ok
t/pod........1..1
ok 1 - POD for 'lib/Chemistry/Isotope.pm'
ok
All tests successful.
Files=2, Tests=7,  0 wallclock secs ( 0.28 cusr +  0.07 csys =  0.35 CPU)
make: *** [htmlifypods] Hangup