unpacking 'https://github.com/NixOS/nixpkgs/archive/e7a3ca8092b61ff85b6a45bf863ea2b2d6a661b3.tar.gz' into the Git cache...
this derivation will be built:
  /nix/store/slr9zxangi96kvygip5wqddg1hc09gfb-bcachefs-module-7.0.0-39-generic.drv
building '/nix/store/slr9zxangi96kvygip5wqddg1hc09gfb-bcachefs-module-7.0.0-39-generic.drv'...