this derivation will be built:
  /nix/store/fmfka1pbxf1lp78w3cg6grgp1s6j9jab-bcachefs-module-7.0.0-31-generic.drv
building '/nix/store/fmfka1pbxf1lp78w3cg6grgp1s6j9jab-bcachefs-module-7.0.0-31-generic.drv'...