unpacking 'https://github.com/NixOS/nixpkgs/archive/2c423e03bbafcff28bfadc6781a4a8257f205cb5.tar.gz' into the Git cache...
this derivation will be built:
  /nix/store/6ddnlpfji6rgqqwaiw9zcrrgdpcas69b-bcachefs-module-7.1.9-arch1-2.drv
building '/nix/store/6ddnlpfji6rgqqwaiw9zcrrgdpcas69b-bcachefs-module-7.1.9-arch1-2.drv'...