diff --git a/flake.nix b/flake.nix
index 2322e97..61b751e 100644
--- a/flake.nix
+++ b/flake.nix
@@ -48,6 +48,7 @@
src = pkgs.lib.fileset.toSource {
root = ./.;
fileset = pkgs.lib.fileset.unions [
+ ./.cargo
./Cargo.toml
./Cargo.lock
./tree-sitter-grammar-repository