tv pkgs haskell: init

tv/5pkgs/haskell/default.nix

@@ -0,0 +1,20 @@
+with import <stockholm/lib>;
+let
+  overrides = self: super:
+    mapNixDir (path: self.callPackage path {}) [
+      <stockholm/krebs/5pkgs/haskell>
+      ./.
+    ];
+in
+  self: super: {
+    haskell = super.haskell // {
+      packages = mapAttrs (name: value:
+        if hasAttr "override" value
+          then value.override { inherit overrides; }
+          else value
+      ) super.haskell.packages;
+    };
+    haskellPackages = super.haskellPackages.override {
+      inherit overrides;
+    };
+  }