this derivation will be built:
  /nix/store/fn1kq7b45dsd45n0av1x6zhm5rn79zh4-bcachefs-module-7.0.0-39-generic.drv
building '/nix/store/fn1kq7b45dsd45n0av1x6zhm5rn79zh4-bcachefs-module-7.0.0-39-generic.drv'...