diff --git a/pkgs/development/python-modules/pysignalr/default.nix b/pkgs/development/python-modules/pysignalr/default.nix
index 1dd2ec3e5912..ec93d51da902 100644
--- a/pkgs/development/python-modules/pysignalr/default.nix
+++ b/pkgs/development/python-modules/pysignalr/default.nix
@@ -34,6 +34,8 @@ buildPythonPackage rec {
     websockets
   ];
 
+  pythonRelaxDeps = [ "websockets" ];
+
   pythonImportsCheck = [ "pysignalr" ];
 
   nativeCheckInputs = [