this derivation will be built:
  /nix/store/b22kff9x47v1dz9jbzd38jbh13m7wjc2-bcachefs-module-7.0.0-30-generic.drv
building '/nix/store/b22kff9x47v1dz9jbzd38jbh13m7wjc2-bcachefs-module-7.0.0-30-generic.drv'...