diff --git a/pkgs/development/python-modules/sentence-stream/default.nix b/pkgs/development/python-modules/sentence-stream/default.nix
index 3d7d2f8edba3..0c6907dba076 100644
--- a/pkgs/development/python-modules/sentence-stream/default.nix
+++ b/pkgs/development/python-modules/sentence-stream/default.nix
@@ -28,6 +28,10 @@ buildPythonPackage rec {
     regex
   ];
 
+  pythonRelaxDeps = [
+    "regex"
+  ];
+
   nativeCheckInputs = [
     pytest-asyncio
     pytestCheckHook