• Have you followed the guidelines in our Contributing document?
• Have you checked to ensure there aren't other open Pull Requests for the same change?
• Have you added an explanation of what your changes do and why you'd like us to include them?
• Have you written new tests for your changes? Here's an example.
• Have you successfully run brew style with your changes locally?
• Have you successfully run brew typecheck with your changes locally?
• Have you successfully run brew tests with your changes locally?

This is needed for @@HOMEBREW_PERL@@ to work

• Keg relocation doesn't account for uses_from_macos when replacing #!@@HOMEBREW_<language>@@ shebangs #20023
• https://github.com/orgs/Homebrew/discussions/6415

One thing is that it won't use versioned Perl path since the built_on in tab is still wrong.

Could do something like following if it matters

tab.built_on = DevelopmentTools.build_system_info

However the versioned Perl path is less useful for plain scripts as it breaks across macOS upgrades. It is more useful when Perl modules are required as compiled modules are incompatible with different Perl versions.

e.g. lesspipe without PR:

❯ head -1 $(brew --prefix lesspipe)/bin/vimcolor
#!/opt/homebrew/opt/perl/bin/perl

after PR:

❯ head -1 $(brew --prefix lesspipe)/bin/vimcolor
#!/usr/bin/perl

e.g. ack (removed postinstall) without PR

❯ head -1 $(brew --prefix ack)/bin/ack
#!/opt/homebrew/opt/perl/bin/perl

after PR

❯ head -1 $(brew --prefix ack)/bin/ack
#!/usr/bin/perl