diff --git a/pkgs/by-name/me/memtree/package.nix b/pkgs/by-name/me/memtree/package.nix
index 7a6ed7a323af..cecc37df961c 100644
--- a/pkgs/by-name/me/memtree/package.nix
+++ b/pkgs/by-name/me/memtree/package.nix
@@ -17,6 +17,8 @@ python3Packages.buildPythonApplication {
     hash = "sha256-Ifp8hwkuyBw57fGer3GbDiJaRjL4TD3hzj+ecGXWqI0=";
   };
 
+  pythonRelaxDeps = [ "rich" ];
+
   nativeBuildInputs = with python3Packages; [
     poetry-core
   ];