anchor.diff:      && cd / \
       && rm -rf /build/cquery
   
  -## Install ccls (C/C++)
  +# ------------------------ ccls (C/C++) ---------------------------------------
   RUN set -ex; \
       deps=' \
           zlib1g-dev \
  
positive.code:     && rm -rf /build/ccls \
      && apt-get purge -y --auto-remove $deps
  
  ## Install YouCompleteMe: Enable C/C++, JavaScript/TypeScript and Java
  RUN set -ex; \
      python3 /build/user_env/vim/plugged/YouCompleteMe/install.py \
          --clang-completer --ts-completer --java-completer
  
  ## Install bash-language-server
  RUN set -ex; \
      npm i -g --unsafe-perm bash-language-server
  
  ## Install python-language-server (pyls)
  RUN set -ex; \
      pip3 install \
          python-language-server
  
negative.code:     && npm install yarn --global \
      && rm -rf /build/n
  
  # ------------------------ OpenJDK --------------------------------------------
  RUN set -ex; \
      apt-get update && apt-get install -y --no-install-recommends \
          $JAVA_VERSION \
  