in reply to re-install modules
I got this one-liner from here
perl MFile::Find=find -MFile::Spec::Functions -e 'find {wanted=>sub{p +rint canonpath $_ if /\.pm\z/}, no_chdir =>1}, @INC;'
And one way to do this is to run this on your target, vanilla installed instance and compare the output of your existing, modified system for differences.
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