As far as I’m aware, Nix Flakes should have had support for relative paths for a while now?
For some reason, when I nix develop in my project on a new Nix installation or after I run gc, I get this:
error: cannot fetch input 'path:../js-dependencys?narHash=sha256-cayhXT6eRBgQuvfu1IKkJpqdjKkhdzRKYsUikx%2fQo%2fY=' because it uses a relative path
Strangely, this goes away once I do flake update. What could be the cause of this annoying behaviour?
This comment in the issue probably explains it?
You seem quite right, thanks for your pointer!
The linked github comment says:
Relative paths currently rely on a source with the correct hash to be already present in the store.
This is fragile but won’t be noticed by the flake author, because creating the lockfile adds locally
I take huge issue with this, it is certainly noticed by the author of the flake. How does one solve the problem? It seems I must first build the included flake before the encompassing flake? EDIT: No, that doesn’t fix the issue.
If you build the included flake before the encompassing flake, it should work.
In the meantime I myself have resorted to workarounds of variously:
--override-input