diff --git a/pkgs/by-name/sc/screentest/package.nix b/pkgs/by-name/sc/screentest/package.nix
index 0c76eaa2d8a8..d64f3300256f 100644
--- a/pkgs/by-name/sc/screentest/package.nix
+++ b/pkgs/by-name/sc/screentest/package.nix
@@ -18,13 +18,18 @@ stdenv.mkDerivation (finalAttrs: {
     hash = "sha256-TJ47c77vQ/aRBJ2uEiFLuAR4dd4CMEo+iAAx0HCFbmA=";
   };
 
+  strictDeps = true;
+
   nativeBuildInputs = [
     autoreconfHook
     intltool
     pkg-config
+    gtk2 # for autoconf macros
   ];
 
-  buildInputs = [ gtk2 ];
+  buildInputs = [
+    gtk2
+  ];
 
   meta = with lib; {
     description = "A simple screen testing tool";