unpacking 'https://github.com/NixOS/nixpkgs/archive/4a29d733e8a7d5b824c3d8c958a946a9867b3eb2.tar.gz' into the Git cache...
this derivation will be built:
  /nix/store/g9571k25ykhynw6r4kk4f1n0l1wcr96c-bcachefs-module-7.0.14-arch1-1.drv
building '/nix/store/g9571k25ykhynw6r4kk4f1n0l1wcr96c-bcachefs-module-7.0.14-arch1-1.drv'...