this derivation will be built:
  /nix/store/q1bdvggswvnh1xq1ld8p62ig9699qw7n-bcachefs-module-7.0.0-39-generic.drv
building '/nix/store/q1bdvggswvnh1xq1ld8p62ig9699qw7n-bcachefs-module-7.0.0-39-generic.drv'...