this derivation will be built:
  /nix/store/ag47idrfhq9ql97ayh3mqg4dd7zk2jl4-bcachefs-module-7.0.0-39-generic.drv
building '/nix/store/ag47idrfhq9ql97ayh3mqg4dd7zk2jl4-bcachefs-module-7.0.0-39-generic.drv'...