diff --git a/pkgs/development/python-modules/simple-websocket/default.nix b/pkgs/development/python-modules/simple-websocket/default.nix
index ecb480359912..fd835f2fd1a3 100644
--- a/pkgs/development/python-modules/simple-websocket/default.nix
+++ b/pkgs/development/python-modules/simple-websocket/default.nix
@@ -24,9 +24,12 @@ buildPythonPackage rec {
     wheel
   ];
 
+  propagatedBuildInputs = [
+    wsproto
+  ];
+
   nativeCheckInputs = [
     pytestCheckHook
-    wsproto
   ];
 
   pythonImportsCheck = [