diff --git a/pkgs/development/python-modules/pyeconet/default.nix b/pkgs/development/python-modules/pyeconet/default.nix
index 81391301c301..ece39326f7c7 100644
--- a/pkgs/development/python-modules/pyeconet/default.nix
+++ b/pkgs/development/python-modules/pyeconet/default.nix
@@ -24,6 +24,8 @@ buildPythonPackage rec {
 
   nativeBuildInputs = [ setuptools ];
 
+  pythonRelaxDeps = [ "paho-mqtt" ];
+
   propagatedBuildInputs = [
     paho-mqtt
     aiohttp