anchor.diff:          ./configure --prefix=/opt/linux/python38 && \
           make && \
           make install && \
  +        /opt/linux/python38/bin/python3 -m pip install wheel && \
       wget -P /usr/local/src/ruby24 \
           https://cache.ruby-lang.org/pub/ruby/2.4/ruby-2.4.10.tar.gz && \
       tar -xf /usr/local/src/ruby24/ruby-2.4.10.tar.gz \
  
positive.code:         ./configure --prefix=/opt/linux/python37 && \
          make && \
          make install && \
      wget -P /usr/local/src/python38 \
          https://www.python.org/ftp/python/3.8.5/Python-3.8.5.tar.xz && \
      tar -xf /usr/local/src/python38/Python-3.8.5.tar.xz \
  
negative.code:         octave liboctave-dev                   \
          php-dev                                \
          pkg-config                             \
          python python-dev python-pip           \
          python3-dev python3-pip                \
          r-base r-cran-rcpp                     \
          ruby ruby-dev                          \
          texinfo                                \
          wget                                   \
          zip &&                                 \
      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 \
  