these 3 derivations will be built:
  /nix/store/0g6gg1f2vidyswjb1jc4dsd4wqidxgah-iets-fuzzers-0.0.0.drv
  /nix/store/hjnibp5vnawyvkdjzbwglqlaz919n3bk-iets-fuzz-diff-0.0.0.drv
  /nix/store/f28f5bjl9if61ds4bisc1cbavv0drh00-iets-fuzz-parse-check.drv
warning: SQLite database '/nix/var/nix/db/db.sqlite' is busy