unpacking 'https://github.com/NixOS/nixpkgs/archive/a5cbcfe954791221bfffe2307f7d1a1bf61a871e.tar.gz' into the Git cache...
this derivation will be built:
  /nix/store/kcn7d7vd6j9fd4nyvyssdhk8p4blsvkj-bcachefs-module-7.1.7-zen1-1-zen.drv
building '/nix/store/kcn7d7vd6j9fd4nyvyssdhk8p4blsvkj-bcachefs-module-7.1.7-zen1-1-zen.drv'...