anchor.diff:  
     py = python3.override {
       # Put packageOverrides at the start so they are applied after defaultOverrides
  -    packageOverrides = lib.foldr lib.composeExtensions (self: super: { }) (defaultOverrides);
  +    packageOverrides = lib.foldr lib.composeExtensions (self: super: { }) defaultOverrides;
     };
   
   in
  
positive.code:     html2text
      python-dotenv
      python-frontmatter
      requests
      setuptools
      tinydb
      validators
      werkzeug
      wtforms
    ];
  
  
negative.code:       --replace 'validators ==' 'validators >=' \
        --replace 'tinydb ==' 'tinydb >=' \
        --replace 'Flask_WTF == 0.14.3' 'Flask_WTF' \
        --replace 'Flask ==' 'Flask >='
    '';
  
    propagatedBuildInputs = [
  