diff --git a/.skip-subtree b/.skip-subtree
new file mode 100644
index 0000000..4948dd5
--- /dev/null
+++ b/.skip-subtree
@@ -0,0 +1 @@
+Imported subtree is not yet fully readTree-compatible.
diff --git a/default.nix b/default.nix
index 19143fc..70d5093 100644
--- a/default.nix
+++ b/default.nix
@@ -16,7 +16,8 @@
 , preLaunch ? ""
 , extraPackages ? []
 , maxLayers ? 20
-, commitHash ? null }@args:
+, commitHash ? null
+, ... }@args:
 
 with pkgs;