anchor.diff:  , alsaLib
   }:
   
  -stdenv.mkDerivation rec {
  +let versionRec = { major = "13"; minor = "4"; patch = "0"; };
  +in stdenv.mkDerivation rec {
     name = "citrix-receiver-${version}";
  -  version = "13.4.0";
  +  version = with versionRec; "${major}.${minor}.${patch}";
     homepage = https://www.citrix.com/downloads/citrix-receiver/linux/receiver-for-linux-latest.html;
   
     prefixWithBitness = if stdenv.is64bit then "linuxx64" else "linuxx86";
   
  -  src = requireFile rec {
  +  src = with versionRec; requireFile rec {
       name = "${prefixWithBitness}-${version}.10109380.tar.gz";
       sha256 =
         if stdenv.is64bit
  
positive.code: 
        ${homepage}
  
        (if you do not find version ${version} there, try https://www.citrix.com/downloads/citrix-receiver/)
  
        Once you have downloaded the file, please use the following command and re-run the
        installation:
  
        nix-prefetch-url file://$PWD/${name}
      '';
    };
  
  
negative.code:     echo "Wrapping wfica..."
      mkdir "$out/bin"
  
      makeWrapper "$ICAInstDir/wfica" "$out/bin/wfica" \
        --add-flags "-icaroot $ICAInstDir" \
        --set ICAROOT "$ICAInstDir" \
        --set GTK_PATH "${gtk2.out}/lib/gtk-2.0:${gnome3.gnome_themes_standard}/lib/gtk-2.0" \
        --set GDK_PIXBUF_MODULE_FILE "$GDK_PIXBUF_MODULE_FILE" \
  