this derivation will be built:
  /nix/store/rad7jhzw0xqiy9y0bgv2issmidkd5q5q-bcachefs-module-7.0.0-39-generic.drv
building '/nix/store/rad7jhzw0xqiy9y0bgv2issmidkd5q5q-bcachefs-module-7.0.0-39-generic.drv'...