this derivation will be built:
  /nix/store/1lvs63kiygnkwan6v3rk9rhrykpcd51j-bcachefs-module-7.0.0-30-generic.drv
building '/nix/store/1lvs63kiygnkwan6v3rk9rhrykpcd51j-bcachefs-module-7.0.0-30-generic.drv'...