diff --git a/pkgs/by-name/ob/obconf/package.nix b/pkgs/by-name/ob/obconf/package.nix
index 7d34f991361c..e35e4d2fc7f1 100644
--- a/pkgs/by-name/ob/obconf/package.nix
+++ b/pkgs/by-name/ob/obconf/package.nix
@@ -40,6 +40,8 @@ stdenv.mkDerivation (finalAttrs: {
     openbox
   ];
 
+  strictDeps = true;
+
   postPatch = ''
     substituteInPlace configure.ac --replace-fail 2.0.4 ${finalAttrs.version}
   '';