dart.super_native_extensions: add 0.9.0-dev.6

    sourceRoot = "${src.name}/rust";

    cargoLock =

    useFetchCargoVendor = true;

    cargoHash =

      rec {

        _0_8_22 = {

          lockFile = ./Cargo-0.8.22.lock;

          outputHashes = {

            "mime_guess-2.0.4" = "sha256-KSw0YUTGqNEWY9pMvQplUGajJgoP2BRwVX6qZPpB2rI=";

          };

        };

        _0_9_0-dev_6 = "sha256-1yJIbBxScmkCwy/e+/z2cYA8qQBfT0yoIBmOSPVd4h4=";

        _0_9_0-dev_5 = _0_8_22;

        _0_9_0-dev_3 = _0_8_22;

        _0_8_22 = "sha256-gYYoC3bGJrYY1uUHfqMv6pp4SK+P9fRoBsLtf34rsCg=";

        _0_8_24 = _0_8_22;

        _0_8_21 = _0_8_22;

        _0_8_20 = _0_8_22;

      }

      .${"_" + (lib.replaceStrings [ "." ] [ "_" ] version)} or (throw ''

        Unsupported version of pub 'super_native_extensions': '${version}'

        Please add ${src}/rust/Cargo.lock

        to this path, and add corresponding entry here. If the lock

        Please add cargoHash to here. If the cargoHash

        is the same with existing versions, add an alias here.

      '');