unpacking 'https://github.com/NixOS/nixpkgs/archive/3ed67ec0a4d3c7ab4ae1f04f8ee8df07bfa506a2.tar.gz' into the Git cache...
this derivation will be built:
  /nix/store/84d87g6yavv01p1yflw6b24rgdvj7iq5-bcachefs-module-7.0.0-31-generic-64k.drv
building '/nix/store/84d87g6yavv01p1yflw6b24rgdvj7iq5-bcachefs-module-7.0.0-31-generic-64k.drv'...