anchor.diff:          make && \
           make install && \
       wget -P /usr/local/src/cmake \
  -        https://github.com/Kitware/CMake/releases/download/v3.18.4/cmake-3.18.4.tar.gz && \
  -    tar -xf /usr/local/src/cmake/cmake-3.18.4.tar.gz \
  +        https://github.com/Kitware/CMake/releases/download/v3.22.1/cmake-3.22.1.tar.gz && \
  +    tar -xf /usr/local/src/cmake/cmake-3.22.1.tar.gz \
           -C /usr/local/src/cmake \
           --strip 1 && \
       cd /usr/local/src/cmake && \
  
positive.code:     python2 -m pip install setuptools wheel && \
      python3 -m pip install setuptools wheel && \
      wget -P /usr/local/src/swig \
          http://prdownloads.sourceforge.net/swig/swig-4.0.1.tar.gz && \
      tar -xf /usr/local/src/swig/swig-4.0.1.tar.gz \
          -C /usr/local/src/swig \
          --strip 1 && \
      cd /usr/local/src/swig && \
  
negative.code:         -C /opt/linux/lua54 && \
      cd /usr/local/src && rm -rf ..?* .[!.]* *
  
  # Install windows build tools (mingw) and libraries.
  RUN mkdir -p /opt/wincross/archives                && \
      cd /opt/wincross                               && \
  