anchor.diff:             mariadb-client-libs \
              mariadb-libs \
              nodejs \
  -           openssl \
  +           libressl \
              ruby-bigdecimal \
              ruby-io-console \
              ruby-irb \
  
positive.code:            make \
             mariadb-dev \
             musl-dev \
             openssl-dev \
             ruby-dev \
      && apk add --no-cache \
             bash \
  
negative.code: FROM alpine:3.5
  
  ENV NOKOGIRI_USE_SYSTEM_LIBRARIES="1"
  
  