diff --git a/pkgs/development/tools/parsing/hammer/default.nix b/pkgs/development/tools/parsing/hammer/default.nix
index 0a9dfdec0163..402f83bea16b 100644
--- a/pkgs/development/tools/parsing/hammer/default.nix
+++ b/pkgs/development/tools/parsing/hammer/default.nix
@@ -1,4 +1,4 @@
-{ lib, stdenv, fetchgit, glib, pkg-config, python, scons }:
+{ lib, stdenv, fetchgit, glib, pkg-config, scons }:
 
 stdenv.mkDerivation {
   pname = "hammer";
@@ -10,8 +10,10 @@ stdenv.mkDerivation {
     rev = "47f34b81e4de834fd3537dd71928c4f3cdb7f533";
   };
 
-  nativeBuildInputs = [ pkg-config ];
-  buildInputs = [ glib python scons ];
+  nativeBuildInputs = [ pkg-config scons ];
+  buildInputs = [ glib ];
+
+  strictDeps = true;
 
   meta = with lib; {
     description = "A bit-oriented parser combinator library";