this derivation will be built:
  /nix/store/5qklq675gszhlz1yzb7h8dyx4rwns43h-bcachefs-module-7.0.0-39-generic.drv
building '/nix/store/5qklq675gszhlz1yzb7h8dyx4rwns43h-bcachefs-module-7.0.0-39-generic.drv'...