Hah ... your backpan link led me to realize the actual problem with Test::More. It got folded into Test::Simple at some point, and evidently cpanm isn't smart enough to handle a request for a back version in such cases. But this works:
$ cpanm install Test::Simple@0.87_01 ... $ perl -MTest::More -e 'print $Test::More::VERSION, "\n";' 0.8701 So we oughta recommend that instead. Now I'm wondering what version of IPC::Run to recommend. regards, tom lane