self: super: {
  haskell = super.haskell // {
    packageOverrides = self.lib.composeExtensions super.haskell.packageOverrides (let
    pkgs = self;
  in
    self: super: {
      sh = pkgs.haskell.lib.dontCheck (self.callCabal2nix "sh" ./.. { });
    });
  };
}