Hi hippo,
For large numbers of modules I usually make use of cpanm's --installdeps switch, which requires building a list of modules you wish to install and saving to a simple formatted file typically named cpanfile. The output from this command (which I run with --quiet as already suggested by stevieb) includes failures at the end something like:
! Installing the dependencies failed: Module 'NOTstrictures' is not in
+stalled
! Bailing out the installation for .
Hope this helps!
The way forward always starts with a minimal test.