this derivation will be built:
  /nix/store/9vkg2pfvjq31813aw8mydy6zshx56mkj-bcachefs-module-7.0.0-39-generic.drv
building '/nix/store/9vkg2pfvjq31813aw8mydy6zshx56mkj-bcachefs-module-7.0.0-39-generic.drv'...