anchor.diff:  
       rm $out/${appdir}/wmctrl
       ln -s ${wmctrl}/bin/wmctrl $out/${appdir}/wmctrl
  +
  +    runHook postInstall
     '';
   
  -  fixupPhase = ''
  +  preFixup = ''
       INTERP=$(cat $NIX_CC/nix-support/dynamic-linker)
       RPATH="${ldpath}:$out/${appdir}"
       getType='s/ *Type: *\([A-Z]*\) (.*/\1/'
  
positive.code: let
    # NOTE: When updating, please also update in current stable,
    # as older versions stop working
    version = "28.4.14";
    sha256 =
      {
        "x86_64-linux" = "02pfly33bg85c8y3igvkhyshra8ra089ghjibhzl1a4fmd45wf52";
        "i686-linux"   = "10swkjbzkyf19cilzw7ja6byla4dllr52pbz19wjzb8rv088gcla";
      }."${stdenv.system}" or (throw "system ${stdenv.system} not supported");
  
    arch =
  
negative.code:   # relative location where the dropbox libraries are stored
    appdir = "opt/dropbox";
  
    libs =
      [
        dbus_libs fontconfig freetype gcc.cc glib libdrm libffi libICE libSM
        libX11 libXcomposite libXext libXmu libXrender libxcb libxml2 libxslt
  