diff --git a/flake.nix b/flake.nix
new file mode 100644
index 0000000..3d7ea8e
--- /dev/null
+++ b/flake.nix
@@ -0,0 +1,4 @@
+# nix insists that we need a flake.nix if we want ot use --override-input...
+{
+  outputs = {...}: {};
+}