[PuercoPop]

That is what I was trying to say by

> Other than using version control to determine what are the sources of the derivation

I don't think that defaulting to using git to list the sources when inside a git repo means that it is tightly coupled to git. If one doesn't want to commit/stage the flake files in the repo one can do `nix develop .` and it works . It will take a little longer because it will copy the entire directory to the store iiuc.