diff --git a/flake.nix b/flake.nix
index 9696fd9..bbad842 100644
--- a/flake.nix
+++ b/flake.nix
@@ -36,7 +36,7 @@
 						jq
 						packer
 						shellcheck
-						(xonsh.overridePythonAttrs { python3 = basicPython; })
+						(xonsh.overridePythonAttrs (old: rec { python3 = basicPython; propagatedBuildInputs = old.propagatedBuildInputs ++ [ python3.pkgs.ruamel-yaml ];}))
 					];
 				};
 			};