* Darcs should do an explicit -lz, since it's no longer getting it

implicitly through curl (because curl 7.16 has -lz as a private
  dependency in its pkgconfig file).

svn path=/nixpkgs/trunk/; revision=8777

pkgs/applications/version-management/darcs/default.nix

@@ -8,6 +8,8 @@ stdenv.mkDerivation {
   };
   buildInputs = [ghc zlib ncurses curl];
 
+  NIX_LDFLAGS = "-lz";
+
   meta = {
     description = "Patch-based version management system";
   };