diff --git a/pkgs/by-name/mo/modelscan/package.nix b/pkgs/by-name/mo/modelscan/package.nix
index eb746ead7b83..1a7b96927377 100644
--- a/pkgs/by-name/mo/modelscan/package.nix
+++ b/pkgs/by-name/mo/modelscan/package.nix
@@ -16,6 +16,8 @@ python3.pkgs.buildPythonApplication rec {
     hash = "sha256-8VupkPiHebVtOqMdtkBflAI1zPRdDSvHCEq3ghjASaE=";
   };
 
+  pythonRelaxDeps = [ "rich" ];
+
   build-system = with python3.pkgs; [
     poetry-core
     poetry-dynamic-versioning