exemple

haskell/default.nix

@@ -0,0 +1,17 @@
+{ nixpkgs ? import <nixpkgs> { }
+, ghc ? nixpkgs.ghc
+}:
+
+with nixpkgs;
+
+let
+  R = pkgs.R.override { enableStrictBarrier = true; };
+in
+
+haskell.lib.buildStackProject {
+  name = "HaskellR";
+  buildInputs = [ R zeromq zlib ];
+  inherit ghc;
+}
+
+#stdenv.mkDerivation rec {