'PM_FILTER' => 'perl -pe \"
  if (\"$(INSTALLDIRS)\" eq \"perl\")
  {
    s|INST_LIBDIR|$(INSTALLPRIVLIB)|g;
  }
  elsif (\"$(INSTALLDIRS)\" eq \"vendor\")
  {
    s|INST_LIBDIR|$(INSTALLVENDORLIB)|g;
  }
  else
  {
    s|INST_LIBDIR|$(INSTALLSITELIB)|g;
  }
\"'