Uses submodules to track bril for dependencies brili and bril2json and bril2text.
Nix sets up a venv for the python utils.
./bin/setup.sh should be called to set up a existing venv. This can mean either a fresh clone, or rm -r .venv and applying the flake again (this is necessary when moving the dir, as the paths related to the venv get messed up).
nix develop # (or automatic using direnv)
git submodule init && git submodule update
./bin/setup.sh