this derivation will be built:
  /nix/store/i61072vh8056b82gwj454cbw833rq52w-bcachefs-module-7.0.0-38-generic-64k.drv
building '/nix/store/i61072vh8056b82gwj454cbw833rq52w-bcachefs-module-7.0.0-38-generic-64k.drv'...