anchor.diff:  	&& make -j "$(nproc)" \
   	&& make install \
   	\
  -	&& runDeps="$( \
  -		scanelf --needed --nobanner --format '%n#p' --recursive /usr/local \
  -			| tr ',' '\n' \
  -			| sort -u \
  -			| awk 'system("[ -e /usr/local/lib/" $1 " ]") == 0 { next } { print "so:" $1 }' \
  -	)" \
  -	&& apk add --virtual .ruby-rundeps $runDeps \
  -		bzip2 \
  -		ca-certificates \
  -		libffi-dev \
  -		libressl-dev \
  -		procps \
  -		yaml-dev \
  -		zlib-dev \
  -	&& apk del .ruby-builddeps \
  +	&& apt-get purge -y --auto-remove $buildDeps \
   	&& cd / \
   	&& rm -r /usr/src/ruby \
   	\
  
positive.code:   && tar -xzf yarn-v$YARN_VERSION.tar.gz -C /opt/ \
    && ln -s /opt/yarn-v$YARN_VERSION/bin/yarn /usr/local/bin/yarn \
    && ln -s /opt/yarn-v$YARN_VERSION/bin/yarnpkg /usr/local/bin/yarnpkg \
    && rm yarn-v$YARN_VERSION.tar.gz.asc yarn-v$YARN_VERSION.tar.gz \
    && apk del .build-deps-yarn
  
  # skip installing gem documentation
  RUN mkdir -p /usr/local/etc \
  
negative.code: 	\
  	&& autoconf \
  	&& gnuArch="$(dpkg-architecture --query DEB_BUILD_GNU_TYPE)" \
  	&& ./configure \
  		--build="$gnuArch" \
  		--disable-install-doc \
  