Perl Setup Hook

doc/hooks/perl.section.md

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# Perl {#setup-hook-perl}

Adds the `lib/site_perl` subdirectory of each build input to the `PERL5LIB` environment variable. For instance, if `buildInputs` contains Perl, then the `lib/site_perl` subdirectory of each input is added to the `PERL5LIB` environment variable.

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Title: Perl Setup Hook

Summary

This setup hook automatically adds the `lib/site_perl` subdirectory from each build input to the `PERL5LIB` environment variable, making Perl modules available during the build process. If `buildInputs` contains Perl, its `lib/site_perl` is added.