apbs: add libutil for darwin

Author: paparodeo

pkgs/applications/science/chemistry/apbs/default.nix

@@ -8,6 +8,7 @@
 , python3
 , libintl
 , libiconv
+, darwin
 }:
 let
   # this is a fork version of fetk (http://www.fetk.org/)
@@ -87,6 +88,7 @@ stdenv.mkDerivation (finalAttrs: {
   ] ++ lib.optionals stdenv.hostPlatform.isDarwin [
     libintl
     libiconv
+    darwin.libutil
   ];
 
   cmakeFlags = [