diff --git a/nixos/lib/testing.nix b/nixos/lib/testing.nix
index d9b4ec89ce7..59d05f87d5f 100644
--- a/nixos/lib/testing.nix
+++ b/nixos/lib/testing.nix
@@ -28,7 +28,7 @@ rec {
 
         wrapProgram $out/bin/nixos-test-driver \
           --prefix PATH : "${qemu_kvm}/bin:${vde2}/bin:${netpbm}/bin:${coreutils}/bin" \
-          --prefix PERL5LIB : "${with perlPackages; pkgs.lib.makePerlPath [ TermReadLineGnu XMLWriter IOTty FileSlurp ]}:$out/lib/perl5/site_perl"
+          --prefix PERL5LIB : "${with perlPackages; lib.makePerlPath [ TermReadLineGnu XMLWriter IOTty FileSlurp ]}:$out/lib/perl5/site_perl"
       '';
   };
 
diff --git a/pkgs/top-level/perl-packages.nix b/pkgs/top-level/perl-packages.nix
index c9b26985780..d8d66ff1cd4 100644
--- a/pkgs/top-level/perl-packages.nix
+++ b/pkgs/top-level/perl-packages.nix
@@ -5739,7 +5739,7 @@ let self = _self // overrides; _self = with self; {
     };
   };
 
-  lib = buildPerlPackage {
+  lib_ = buildPerlPackage {
     name = "lib-0.63";
     src = fetchurl {
       url = mirror://cpan/authors/id/S/SM/SMUELLER/lib-0.63.tar.gz;