this derivation will be built:
  /nix/store/ahvp04bpn4595b1cwcn67h836ylfz9cw-bcachefs-module-7.0.0-39-generic.drv
building '/nix/store/ahvp04bpn4595b1cwcn67h836ylfz9cw-bcachefs-module-7.0.0-39-generic.drv'...