I’ve been seeing that nix develop takes a very long time on large projects, and I believe it’s due to the whole folder being copied to the store.
nix-shell doesn’t have this problem, but I need flakes specifically because they allow to have runtime libraries, which shell doesn’t seem to support. (Translating flake.nix to a shell.nix exactly has different execution results.)
What can I do? I’ve tried putting the flake.nix on an empty subfolder, and it solves it, but it’s extremely tedious and clunky.
Have you added your flake.nix to your repo? When its not in the repo it does seem to do some copying, whereas if its checked in its pretty fast.