unpacking 'https://github.com/NixOS/nixpkgs/archive/e7a3ca8092b61ff85b6a45bf863ea2b2d6a661b3.tar.gz' into the Git cache...
this derivation will be built:
  /nix/store/vl8cl7wxv6gqwix0h4139h6dx3v1scl7-bcachefs-module-7.0.0-34-generic.drv
building '/nix/store/vl8cl7wxv6gqwix0h4139h6dx3v1scl7-bcachefs-module-7.0.0-34-generic.drv'...