我刚刚将我的 Macbook Air 从 10.15 更新到 11.1，然后尝试使用 perlbrew 安装 perl 5.32：
$ 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
并且构建日志显示：
[...]
Which of these apply, if any? [darwin]
*** Unexpected product version 11.1.
***
*** Try running sw_vers and see what its ProductVersion says.
##### Brew Failed #####
幸运的是，这个问题已经在 Perl 开发分支中修复了，参见添加对 darwin.sh 的 11.x 支持。那么这个修复现在如何向后移植到 Perl 5.32.0 并与 perlbrew 一起应用呢？
Can 补丁程序在这里使用？
看来我只需要跑：
$ 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
然后重新运行
$ perlbrew install perl-5.32.0
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