treewide: stdenv.lib -> lib

pkgs/applications/science/logic/prover9/default.nix

@@ -1,4 +1,4 @@
-{stdenv, fetchurl}:
+{lib, stdenv, fetchurl}:
 
 stdenv.mkDerivation {
   name = "prover9-2009-11a";
@@ -39,7 +39,7 @@ stdenv.mkDerivation {
       for first-order and equational logic. Prover9 is a successor of
       the Otter Prover. This is the LADR command-line version.
     '';
-    platforms = stdenv.lib.platforms.linux;
+    platforms = lib.platforms.linux;
     maintainers = [];
   };
 }