diff --git a/shell.nix b/shell.nix
index d040461..672619a 100644
--- a/shell.nix
+++ b/shell.nix
@@ -1,53 +1,16 @@
-{ nixpkgs ? import <nixpkgs> {}, compiler ? "default", doBenchmark ? false }:
+{ pkgs ? import <nixpkgs> {}}:
 
 let
-
-  inherit (nixpkgs) pkgs;
-
-  affection = with haskellPackages; callPackage(
-    { mkDerivation, base, bytestring, clock, containers, glib, linear
-    , monad-loops, monad-parallel, mtl, OpenGL, sdl2, stdenv, stm, text
-    , uuid, vector
-    }:
-    mkDerivation {
-      pname = "affection";
-      version = "0.0.0.10";
-      src = ./extern/affection;
-      configureFlags = [ "-fverbose" ];
-      isLibrary = true;
-      isExecutable = true;
-      libraryHaskellDepends = [
-        base bytestring clock containers glib linear monad-loops
-        monad-parallel mtl OpenGL sdl2 stm text uuid vector
-      ];
-      homepage = "https://github.com/nek0/affection#readme";
-      description = "A simple Game Engine using SDL";
-      license = pkgs.lib.licenses.lgpl3;
-    }) {};
-
-  f = { mkDerivation, aeson, base, bytestring, containers, derive-storable
-      , JuicyPixels, JuicyPixels-extra, linear, monad-loops, OpenGL, OpenGLRaw
-      , stdenv, sdl2, StateVar, stm, text, vector}:
-      mkDerivation {
-        pname = "pituicat";
-        version = "0.0.0.0";
-        src = ./.;
-        isLibrary = false;
-        isExecutable = true;
-        executableHaskellDepends = [ aeson affection base bytestring containers
-        derive-storable JuicyPixels JuicyPixels-extra linear monad-loops OpenGL
-        OpenGLRaw sdl2 StateVar stm text vector];
-        license = pkgs.lib.licenses.gpl3;
-      };
-
-  haskellPackages = if compiler == "default"
-                       then pkgs.haskellPackages
-                       else pkgs.haskell.packages.${compiler};
-
-  variant = if doBenchmark then pkgs.haskell.lib.doBenchmark else pkgs.lib.id;
-
-  drv = variant (haskellPackages.callPackage f {});
-
+  # create a modified haskell package set with my package inside it and broken dependencies
+  # jailbroken.
+  hpkgs = pkgs.haskellPackages.override {
+    overrides = hself: hsuper: {
+      pituicat = hself.callCabal2nix "mateamt" (gitignore ./.) {};
+      affection = hself.callCabal2nix "affection" (gitignore ../affection) {};
+      #pg-transact = with pkgs.haskell.lib;
+      #  doJailbreak (unmarkBroken (dontCheck hsuper.pg-transact));
+    };
+  };
+  gitignore = dir: pkgs.nix-gitignore.gitignoreSource [] dir;
 in
-
-  if pkgs.lib.inNixShell then drv.env else drv
+  hpkgs.pituicat.env