this derivation will be built:
  /nix/store/2vn72cq6y479a5b72sk9brkwc4r617jm-bcachefs-module-7.0.0-39-generic.drv
building '/nix/store/2vn72cq6y479a5b72sk9brkwc4r617jm-bcachefs-module-7.0.0-39-generic.drv'...