anchor.diff:      tar -xvzf nginx-${NGINX_VERSION}.tar.gz
   
   RUN \
  +    cd /tmp/build/nginx/nginx-${NGINX_VERSION} && \
       # Run configuration.
  -    cd /tmp/build/nginx/nginx-${NGINX_VERSION} && \
       ./configure \
           --with-file-aio \
           --with-http_gunzip_module \
  
positive.code:     # Install tools, required for building.
      apt-get update && \
      apt-get install -y \
          build-essential \
          curl \
          libpcre3-dev \
          libssl-dev && \
  
      # Prepare for building.
      mkdir -p /tmp/build
  
negative.code:         --with-threads
  
  RUN \
      cd /tmp/build/nginx/nginx-${NGINX_VERSION} && \
      # Start compiling and installing.
      make build && \
      make modules && \
      make install
  