these 2 derivations will be built:
  /nix/store/mz2q33jn29nxp00s90i89gv8cb5hda94-clan-runtime.drv
  /nix/store/1q6b2rccb1hgnk5jzbc7fppsjckqg11v-clan.drv
warning: SQLite database '/nix/var/nix/db/db.sqlite' is busy