unpacking 'https://github.com/NixOS/nixpkgs/archive/f13ff45afd1bb73e640eaa08a7066dbed07e3238.tar.gz' into the Git cache...
this derivation will be built:
  /nix/store/mkj23wsldiw4wdaszgm6my4w4zr4bqrs-bcachefs-module-7.0.0-31-generic.drv
building '/nix/store/mkj23wsldiw4wdaszgm6my4w4zr4bqrs-bcachefs-module-7.0.0-31-generic.drv'...