anchor.diff:    };
     pagella = {
       displayName = "Pagella";
  -    version ="2.004";
  -    sha256 = "0b2pjhw1ihnl951slln6d6vafjd3i6p4i947lwybvg8081qfvd9z";
  -    outputHash = "0c6s0r14qax3b4amvm9nffwzby8mm4p7r2hfb8yv9jzhjwa5z8rd";
  +    version ="2_501";
  +    sha256 = "1kccaxs3vk93la2pz4nv05hx1x3diyla49cz4l33zifdcp2zgg9d";
  +    outputHash = "1nnjsgplimh29502pkd19rvfg93x31svxxmx4x7h51njrx1j8qa8";
       abbreviation = "qpl";
     };
     schola = {
  
positive.code: 
      installPhase = ''
        mkdir -p $out/share/fonts/opentype/
        cp -v *.otf $out/share/fonts/opentype/
      '';
  
  
negative.code: in stdenv.lib.mapAttrs mkVariant {
    adventor = {
      displayName = "Adventor";
      version = "2_501";
      sha256 = "0qjg3x0adfppyx3x33cm07ww9i9sl88xaq07m7wfip8rmyp567fn";
      outputHash = "117h6f02m1r54b4f1a98q5kkjchl5pv9ibm1jla6xrzhk2pchb27";
      abbreviation = "qag";
    };
    bonum = {
  