diff --git a/pkgs/development/python-modules/temporalio/default.nix b/pkgs/development/python-modules/temporalio/default.nix
index 63c45ee9f3f7..110d9a68b333 100644
--- a/pkgs/development/python-modules/temporalio/default.nix
+++ b/pkgs/development/python-modules/temporalio/default.nix
@@ -33,8 +33,12 @@ buildPythonPackage rec {
   };
 
   cargoDeps = rustPlatform.fetchCargoVendor {
-    inherit pname version src;
-    sourceRoot = "${src.name}/${cargoRoot}";
+    inherit
+      pname
+      version
+      src
+      cargoRoot
+      ;
     hash = "sha256-9hP+zN6jcRmRhPmcZ4Zgp61IeS7gDPfsOvweAxKHnHM=";
   };