this derivation will be built:
  /nix/store/rr721clj8dir08r7v0fh1mb18nfqx537-bcachefs-module-7.0.0-28-generic.drv
building '/nix/store/rr721clj8dir08r7v0fh1mb18nfqx537-bcachefs-module-7.0.0-28-generic.drv'...