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; }; }