diff --git a/pkgs/applications/office/fava/default.nix b/pkgs/applications/office/fava/default.nix
index fce5bb149641..9a81afb8c6a5 100644
--- a/pkgs/applications/office/fava/default.nix
+++ b/pkgs/applications/office/fava/default.nix
@@ -10,7 +10,9 @@ python3.pkgs.buildPythonApplication rec {
     sha256 = "sha256-Uw8UIJa+Dtsy+o31I1ynLyhZrFNX42NFRXu1O2ISbzU=";
   };
 
-  nativeBuildInputs = with python3.pkgs; [ setuptools-scm ];
+  pythonRelaxDeps = [ "cheroot" ];
+
+  nativeBuildInputs = with python3.pkgs; [ setuptools-scm pythonRelaxDepsHook ];
 
   propagatedBuildInputs = with python3.pkgs; [
     babel