diff --git a/pkgs/by-name/mo/monado/package.nix b/pkgs/by-name/mo/monado/package.nix
index 1c029e710606..49c922ec44f9 100644
--- a/pkgs/by-name/mo/monado/package.nix
+++ b/pkgs/by-name/mo/monado/package.nix
@@ -154,7 +154,6 @@ stdenv.mkDerivation (finalAttrs: {
     (lib.cmakeBool "XRT_HAVE_TRACY" tracingSupport)
     (lib.cmakeBool "XRT_FEATURE_TRACING" tracingSupport)
     (lib.cmakeBool "XRT_OPENXR_INSTALL_ABSOLUTE_RUNTIME_PATH" true)
-    (lib.cmakeBool "XRT_HAVE_STEAM" true)
   ];
 
   # Help openxr-loader find this runtime