this derivation will be built:
  /nix/store/x21zyr15b6dq7zbfnz82yi9vnz4jzizg-bcachefs-module-7.0.0-39-generic.drv
building '/nix/store/x21zyr15b6dq7zbfnz82yi9vnz4jzizg-bcachefs-module-7.0.0-39-generic.drv'...