unpacking 'https://github.com/NixOS/nixpkgs/archive/2c423e03bbafcff28bfadc6781a4a8257f205cb5.tar.gz' into the Git cache...
this derivation will be built:
  /nix/store/bb2bsjqrvx0y40rmgkmg5fm48iaiwiby-bcachefs-module-7.1.9-zen1-2-zen.drv
building '/nix/store/bb2bsjqrvx0y40rmgkmg5fm48iaiwiby-bcachefs-module-7.1.9-zen1-2-zen.drv'...