Set enviroment variables
export ICU4X_BUILD_MODE=checkout
export LOCAL_ICU4X_CHECKOUT=/path/to/icu4x/repo
To run the app in JIT mode
dart --enable-experiment=native-assets run
To run the app in AOT mode
dart --enable-experiment=native-assets build bin/dart_intl4x_example.dart
which builds the executable in bin/dart_intl4x_example/.