these 4 derivations will be built:
  /nix/store/dmq18pjraw7qsgc542in24hjjakni218-iets-fuzz-diff-0.0.0.drv
  /nix/store/kczbpvr6hvjzir6ajkyv7bmm3al0yw90-iets-0.1.0.drv
  /nix/store/7fyb58ql2kqlliqw4b92cnzc73zrz23l-iets-conformance-adapter.drv
  /nix/store/bba0j4fa1q9llpnpmzpbvfk0d9m75s4w-nix-conformance-iets.drv
warning: SQLite database '/nix/var/nix/db/db.sqlite' is busy