anchor.diff:              done; \
       done \
   \
  -    && apt-get install -y skytools3-ticker \
  +    && apt-get install -y skytools3-ticker pgbouncer \
   \
       && sed -i "s/ main.*$/ main/g" /etc/apt/sources.list.d/pgdg.list \
       && apt-get update \
  
positive.code:     else \
          BUILD_PACKAGES="$BUILD_PACKAGES pgxnclient zlib1g-dev libprotobuf-c-dev libpam0g-dev libcurl4-openssl-dev libicu-dev python libc-ares-dev pandoc pkg-config" \
  # debezium-decoderbufs: libprotobuf-c-dev
  # pgbouncer: libc-ares-dev pandoc pkg-config
          && apt-get install -y $BUILD_PACKAGES libprotobuf-c1 libcurl4 \
  \
          # install pam_oauth2.so
  
negative.code:             # create postgis symlinks to make it possible to perform update
              && ln -s postgis-${POSTGIS_VERSION%.*}.so \
                  /usr/lib/postgresql/${version}/lib/postgis-2.5.so; \
          done; \
      fi \
  \
      # build and install missing packages
  