anchor.diff:  
   stdenv.mkDerivation rec {
     pname = "brave";
  -  version = "1.20.110";
  +  version = "1.21.73";
   
     src = fetchurl {
       url = "https://github.com/brave/brave-browser/releases/download/v${version}/brave-browser_${version}_amd64.deb";
  -    sha256 = "0xmf74qh85f2jvi90q4cw2n7cvx5p46xmdr2iznfy09hdsymxfry";
  +    sha256 = "12jkj9h1smipqlkidnd3r492yfnncl0b2dmjq22qp2vsrscc3jfg";
     };
   
     dontConfigure = true;
  
positive.code:   libXi
    libXrandr
    libXrender
    libXtst
    libuuid
    mesa
  
negative.code: , libXrandr
  , libXrender
  , libXScrnSaver
  , libxshmfence
  , libXtst
  , mesa
  , nspr
  