this derivation will be built:
  /nix/store/m4mhznm7scyqs16fk205fsk0nh7qw80f-bcachefs-module-7.0.0-31-generic.drv
building '/nix/store/m4mhznm7scyqs16fk205fsk0nh7qw80f-bcachefs-module-7.0.0-31-generic.drv'...