if (!(inputState instanceof InputState.Ready)) {
            throw new IllegalStateException(inputState.toString());
        }
        writeModuleMetadata(
            ((InputState.Ready) inputState).moduleMetadataSpec.get()
        );
    }

    private void writeModuleMetadata(ModuleMetadataSpec moduleMetadataSpec) {
        try (Writer writer = bufferedWriterFor(outputFile.get().getAsFile())) {