diff --git a/default.nix b/default.nix
index 54ad6c4..6e5598f 100644
--- a/default.nix
+++ b/default.nix
@@ -5,22 +5,6 @@ let
                        then pkgs.haskellPackages
                        else pkgs.haskell.packages.${compiler};
 
-  tasty-hedgehog-github = pkgs.callPackage (pkgs.fetchFromGitHub {
-    owner = "qfpl";
-    repo = "tasty-hedgehog";
-    rev = "5da389f5534943b430300a213c5ffb5d0e13459e";
-    sha256 = "04pmr9q70gakd327sywpxr7qp8jnl3b0y2sqxxxcj6zj2q45q38m";
-  }) {};
-
-  modifiedHaskellPackages = haskellPackages.override {
-    overrides = self: super: {
-      tasty-hedgehog =
-        if super ? tasty-hedgehog
-        then super.tasty-hedgehog
-        else tasty-hedgehog-github;
-    };
-  };
-
-  lets-lens = modifiedHaskellPackages.callPackage ./lets-lens.nix {};
+  lets-lens = haskellPackages.callPackage ./lets-lens.nix {};
 in
   lets-lens