diff --git a/flake.nix b/flake.nix
index 28d79d58..442ad0a4 100644
--- a/flake.nix
+++ b/flake.nix
@@ -19,7 +19,7 @@
         src = nix-filter.lib.filterSource {
           src = ./.;
           filter = name: type: builtins.elem (baseNameOf name) [
-            "src", "Cargo.lock", "Cargo.toml", "rust-toolchain.toml"
+            "src" "Cargo.lock" "Cargo.toml" "rust-toolchain.toml"
           ] || (type == "directory" && builtins.elem (baseNameOf name) ["src"]);
         };