unpacking 'https://github.com/NixOS/nixpkgs/archive/ffb3c9b700e759be2ef13237c9d8f953b32a1e46.tar.gz' into the Git cache...
this derivation will be built:
  /nix/store/ilhf6vnwsc45yimbl6vmwkdzfqx5478n-bcachefs-module-7.1.9-arch1-2.drv
building '/nix/store/ilhf6vnwsc45yimbl6vmwkdzfqx5478n-bcachefs-module-7.1.9-arch1-2.drv'...