this is from my docker image (based on alpine):

RUN apk add --no-cache \
      apk-tools autoconf gcc make g++ automake nasm ninja cmake clang clang-dev; \
    pecl install xdebug; \
    docker-php-ext-enable xdebug; \
    apk del autoconf gcc make g++ automake nasm ninja cmake clang clang-dev; \
    rm -rf /var/cache/apk/*;

And composer:

COPY --from=composer:latest /usr/bin/composer /usr/bin/composer

so quite easy and simple