unpacking 'https://github.com/NixOS/nixpkgs/archive/2c423e03bbafcff28bfadc6781a4a8257f205cb5.tar.gz' into the Git cache...
this derivation will be built:
  /nix/store/xhsx1rni91s5j89ydnv0assg8xwi9b8r-bcachefs-module-7.1.9-arch1-2.drv
this path will be fetched (232.52 MiB download, 645.29 MiB unpacked):
  /nix/store/fsn4w6za5phgm5yjzf8zyq4cvn0hqwpk-linux-7.1.9-dev
copying path '/nix/store/fsn4w6za5phgm5yjzf8zyq4cvn0hqwpk-linux-7.1.9-dev' from 'https://cache.nixos.org'...
building '/nix/store/xhsx1rni91s5j89ydnv0assg8xwi9b8r-bcachefs-module-7.1.9-arch1-2.drv'...