diff --git a/flake.nix b/flake.nix
index cd259d046..8b4e73af4 100644
--- a/flake.nix
+++ b/flake.nix
@@ -482,6 +482,7 @@
                 format = "pyproject";
                 propagatedBuildInputs = [
                   pkgs.python3Packages.setuptools
+                  pkgs.python3Packages.imap-tools
                 ];
               };