commented out avrdude which is using unstable lib functions,

missing fetchhg expression added

svn path=/nixpkgs/trunk/; revision=9249

pkgs/build-support/fetchhg/default.nix

@@ -0,0 +1,16 @@
+{stdenv, mercurial, nix}: {url, tag ? null, md5}:
+
+stdenv.mkDerivation {
+  name = "fetchdarcs";
+  builder = ./builder.sh;
+  buildInputs = [mercurial nix];
+
+  # Nix <= 0.7 compatibility.
+  id = md5;
+
+  outputHashAlgo = "md5";
+  outputHashMode = "recursive";
+  outputHash = md5;
+  
+  inherit url tag;
+}