* Export a variation point `zlibSupport'.

svn path=/nixpkgs/trunk/; revision=796

pkgs/development/interpreters/python/default.nix

@@ -1,10 +1,15 @@
-{stdenv, fetchurl}: derivation {
+{stdenv, fetchurl, zlib ? null, zlibSupport ? true}:
+
+assert zlibSupport -> zlib != null;
+
+derivation {
   name = "python-2.3.3";
   system = stdenv.system;
   builder = ./builder.sh;
   src = fetchurl {
       url = http://www.python.org/ftp/python/2.3.3/Python-2.3.3.tar.bz2;
       md5 = "70ada9f65742ab2c77a96bcd6dffd9b1";
-    };
-  stdenv = stdenv;
+  };
+  zlib = if zlibSupport then zlib else null;
+  inherit stdenv zlibSupport;
 }