unpacking 'https://github.com/NixOS/nixpkgs/archive/e2587caef70cea85dd97d7daab492899902dbf5d.tar.gz' into the Git cache...
this derivation will be built:
  /nix/store/kp1yamfqqy8bg1dq8c1l83yqxj7xk5c8-bcachefs-module-7.0.0-14-generic.drv
building '/nix/store/kp1yamfqqy8bg1dq8c1l83yqxj7xk5c8-bcachefs-module-7.0.0-14-generic.drv'...