anchor.diff:    ];
   
     outputs = [ "out" "doc" "man" ];
  +
  +  nativeBuildInputs = [ docutils ];
   
     propagatedBuildInputs = with python3Packages; [ pygments requests requests-toolbelt setuptools ];
   
  
positive.code:     toHtml CHANGELOG.rst $docdir/html/CHANGELOG.html
      toHtml CONTRIBUTING.rst $docdir/html/CONTRIBUTING.html
  
      ${docutils}/bin/rst2man \
        --strip-elements-with-class=no-web \
        --title=http \
        --no-generator \
  
negative.code:     sed -e 's/^|build|//g' -i README.rst
  
      toHtml() {
        rst2html5 \
          --strip-elements-with-class=no-web \
          --title=http \
          --no-generator \
  