these 3 derivations will be built:
  /nix/store/1730mmrkvbki81qqr04fqczai3fmhq3j-iets-fuzz-diff-0.0.0.drv
  /nix/store/bj08arjlsq1hldak6hy064bjrhw16255-iets-fuzzers-0.0.0.drv
  /nix/store/sis8zw2di387xn482yz87x3bxlilzi6w-iets-fuzz-drv-check.drv
warning: SQLite database '/nix/var/nix/db/db.sqlite' is busy