these 4 derivations will be built:
  /nix/store/2v1zjbv234mjd19xpjhbna2fa4kdb70n-iets-fuzz-diff-0.0.0.drv
  /nix/store/n5g79w7qk6s5ck6fw0a9xvr0pfa0smmg-iets-0.1.0.drv
  /nix/store/a0xpwpm4fw0km7cpshz4krqzlz5r9i4z-iets-conformance-adapter.drv
  /nix/store/xkf6bb74kldl44szxi6ajkxdxgscyzgm-nix-conformance-iets.drv
warning: SQLite database '/nix/var/nix/db/db.sqlite' is busy