diff --git a/pkgs/development/libraries/mesa/default.nix b/pkgs/development/libraries/mesa/default.nix
index 3554b3ccf15f..bd64c3fa2430 100644
--- a/pkgs/development/libraries/mesa/default.nix
+++ b/pkgs/development/libraries/mesa/default.nix
@@ -347,9 +347,9 @@ stdenv.mkDerivation {
     (buildPackages.mesa.cross_tools or null)
   ];
 
-  disallowedRequisites = lib.optionals needNativeCLC [
-    (buildPackages.mesa.cross_tools or null)
-  ];
+  disallowedRequisites = lib.optional (
+    needNativeCLC && buildPackages.mesa ? cross_tools
+  ) buildPackages.mesa.cross_tools;
 
   doCheck = false;