From "perldoc perlmodlib":

To find out all modules installed on your system, including those with
+out documentation or outside the standard release, just use
       the following command (under the default win32 shell, double qu
+otes should be used instead of single quotes).

           % perl -MFile::Find=find -MFile::Spec::Functions -Tlwe \
             'find { wanted => sub { print canonpath $_ if /\.pm\z/ },
             no_chdir => 1 }, @INC'
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