diff --git a/pkgs/tools/package-management/lix/common-lix.nix b/pkgs/tools/package-management/lix/common-lix.nix
index 8fd3b27e3551..ee79bab99f10 100644
--- a/pkgs/tools/package-management/lix/common-lix.nix
+++ b/pkgs/tools/package-management/lix/common-lix.nix
@@ -223,7 +223,7 @@ stdenv.mkDerivation (finalAttrs: {
     # would be in a Cargo registry cache.
     MESON_PACKAGE_CACHE_DIR =
       if finalAttrs.cargoDeps != null then
-        finalAttrs.cargoDeps
+        "${finalAttrs.cargoDeps}/source-registry-0"
       else
         "lix: no `MESON_PACKAGE_CACHE_DIR`, set `cargoDeps`";
   };