macOS Big Sur: Unexpected product version 11.1. How to patch perlbrew?

Question

I just updated my Macbook Air from 10.15 to 11.1, and then tried to install perl 5.32 with perlbrew:

$ perlbrew install perl-5.32.0
Installing /Users/hakonhaegland/perl5/perlbrew/build/perl-5.32.0/perl-5.32.0 into ~/perl5/perlbrew/perls/perl-5.32.0

This could take a while. You can run the following command on another shell to track the status:

  tail -f ~/perl5/perlbrew/build.perl-5.32.0.log

Installation process failed. To spot any issues, check

  /Users/hakonhaegland/perl5/perlbrew/build.perl-5.32.0.log

and the build log shows:

[...]
Which of these apply, if any? [darwin]

*** Unexpected product version 11.1.
***
*** Try running sw_vers and see what its ProductVersion says.

##### Brew Failed #####

Fortunately, this issue has been fixed in the Perl development branch, see Add 11.x support for darwin.sh . So how can this fix now be backported to Perl 5.32.0 and applied with perlbrew?

Can patchperl be used here?

Answer 1

Seems like I just had to run:

$ perlbrew install-patchperl

/Users/hakonhaegland/perl5/perlbrew/bin/patchperl already exists, are you sure to override ? [y/N] [N] y

patchperl is installed to

    /Users/hakonhaegland/perl5/perlbrew/bin/patchperl

and then rerun

$ perlbrew install perl-5.32.0