BEGIN {
    if(exists $ENV{PAR_TEMP}) {
        my $dir = $ENV{PAR_TEMP};
        chdir $dir;
        my @substitutions = qw/Mojo Mojolicious/;
        for(@substitutions){
            next if -l;
            symlink "inc/$_", $_
                or die "Can't symlink $_ at $dir: $!";
        }
        print "I'm at at $dir\n";
    }
}