these 3 derivations will be built:
  /nix/store/clprz153jp8f8br5bqw71ylljcsnlyl3-iets-fuzz-diff-0.0.0.drv
  /nix/store/r4gwhg1v138izn06wj468yj2xiwjavbg-iets-fuzzers-0.0.0.drv
  /nix/store/icl7avsmrpws1jdlnagvddb6ayz5ckh6-iets-fuzz-parse-check.drv
warning: SQLite database '/nix/var/nix/db/db.sqlite' is busy