Hello
perlbrew uses File::Path::make_path function.
but make_path is only included after File::Path ver. 2.07_03( Perl 5.10.1 )
So, perlbrew is generating the following error in below perl 5.10.0 (
without updated File::Path module )
$ perl perlbrew install
Undefined subroutine &File::Path::make_path called at perlbrew line 871.
I think you can fix some code to improve the compatibility
because bootstraping in perlbrew with bare minimum requirement is essential.