diff --git a/pkgs/games/crispy-doom/default.nix b/pkgs/games/crispy-doom/default.nix
index 432600e879f4..3d46de725c76 100644
--- a/pkgs/games/crispy-doom/default.nix
+++ b/pkgs/games/crispy-doom/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, autoreconfHook, pkg-config, SDL2, SDL2_mixer, SDL2_net, fetchFromGitHub, python }:
+{ lib, stdenv, autoreconfHook, pkg-config, SDL2, SDL2_mixer, SDL2_net, fetchFromGitHub, python2 }:
 
 stdenv.mkDerivation rec {
   pname = "crispy-doom";
@@ -16,10 +16,12 @@ stdenv.mkDerivation rec {
     for script in $(grep -lr '^#!/usr/bin/env python$'); do patchShebangs $script; done
   '';
 
-  nativeBuildInputs = [ autoreconfHook pkg-config python ];
+  nativeBuildInputs = [ autoreconfHook pkg-config python2 ];
   buildInputs = [ SDL2 SDL2_mixer SDL2_net ];
   enableParallelBuilding = true;
 
+  strictDeps = true;
+
   meta = {
     homepage = "http://fabiangreffrath.github.io/crispy-doom";
     description = "A limit-removing enhanced-resolution Doom source port based on Chocolate Doom";