anchor.diff:  
   # bcmath
   RUN cd /usr/local/src \
  -    && cd php-7.1.26/ext/bcmath \
  +    && cd php-7.1.30/ext/bcmath \
       && phpize \
       && ./configure \
       && make \
  
positive.code: 
  # pcntl
  RUN cd /usr/local/src \
      && cd php-7.1.26/ext/pcntl \
      && phpize \
      && ./configure \
      && make \
  
negative.code: 
  # gettext
  RUN cd /usr/local/src \
      && cd php-7.1.30/ext/gettext \
      && phpize \
      && ./configure \
      && make \
  