diff --git a/flake.nix b/flake.nix
index e39b981..bd5a5ec 100644
--- a/flake.nix
+++ b/flake.nix
@@ -18,6 +18,10 @@
 
         src = ./.;
 
+        preBuild = ''
+          sed -i 's/rich>=13.9.2/rich>=13.8.1/' pyproject.toml
+        '';
+
         # Add runtime dependencies
         propagatedBuildInputs = with pythonPackages; [
           click