corkscrew: name -> pname

pkgs/tools/networking/corkscrew/default.nix

@@ -1,10 +1,11 @@
 { lib, stdenv, fetchurl, automake }:
 
 stdenv.mkDerivation rec {
-  name = "corkscrew-2.0";
+  pname = "corkscrew";
+  version = "2.0";
 
   src = fetchurl {
-    url = "http://agroman.net/corkscrew/${name}.tar.gz";
+    url = "http://agroman.net/corkscrew/corkscrew-${version}.tar.gz";
     sha256 = "0d0fcbb41cba4a81c4ab494459472086f377f9edb78a2e2238ed19b58956b0be";
   };