these 2 derivations will be built:
  /nix/store/96jpsg10gv560fzs5sc2c996rp9cjhb8-examples.drv
  /nix/store/36r4c3hpgsxhjrdl1k3kv8w7v0kdgjwy-test-examples.drv
warning: SQLite database '/nix/var/nix/db/db.sqlite' is busy