diff --git a/pkgs/development/python-modules/yangson/default.nix b/pkgs/development/python-modules/yangson/default.nix
index 2e82d5c33962..5705ef4dc312 100644
--- a/pkgs/development/python-modules/yangson/default.nix
+++ b/pkgs/development/python-modules/yangson/default.nix
@@ -27,6 +27,8 @@ buildPythonPackage rec {
     pyyaml
   ];
 
+  pythonRelaxDeps = [ "elementpath" ];
+
   nativeCheckInputs = [ pytestCheckHook ];
 
   pythonImportsCheck = [ "yangson" ];