Exclude certain inputs from auto-follow treatment

I have an input to my flake that I'd like to exclude from getting auto-followed: That is, have its nixpkgs and other inputs always be what the upstream .lock file specifies. My understanding is that currently I could: * not want that * Define another input for that input's input, pin it to what my input locks and manually update that pin every time I update the input Neither of these options seems great. Maybe there could be a cmdline argument for inputs whose downstream inputs never to touch, though?