anchor.diff:  
   stdenv.mkDerivation rec {
     pname = "simple-scan";
  -  version = "42.0";
  +  version = "42.1";
   
     src = fetchurl {
       url = "mirror://gnome/sources/${pname}/${lib.versions.major version}/${pname}-${version}.tar.xz";
  -    sha256 = "sha256-rB+Fev0LyIl90gRQI618VxPlzu/KVrCzzF6aR5UylYY=";
  +    sha256 = "sha256-hZvAYRwXabW9q6ljne7TWfUEdMLuz1i7v9fOIZEbIiY=";
     };
   
     nativeBuildInputs = [
  
positive.code:     wrapGAppsHook
      libxml2
      gobject-introspection # For setup hook
    ];
  
    buildInputs = [
  
negative.code:     gdk-pixbuf
      colord
      glib
      gusb
      gtk3
      libhandy
      libwebp
      packagekit
      sane-backends
    ];
  
    postPatch = ''
  