anchor.diff:  
     src = fetchurl {
       url = "https://updates.signal.org/desktop/apt/pool/main/s/signal-desktop/signal-desktop_${version}_amd64.deb";
  -    sha256 = "0scbnkkbaqyqiz6bfvhdrc0yqnccjsf66iggjpa7kjyk3cy61s6c";
  +    sha256 = "1p19vs4wxlghv8cbsq5k4bl8h9fzr9izp4k4qs5fcnqiy1z92ycy";
     };
   
     nativeBuildInputs = [
  
positive.code:   preFixup = ''
      gappsWrapperArgs+=(
        --prefix LD_LIBRARY_PATH : "${lib.makeLibraryPath [ stdenv.cc.cc ] }"
        --prefix LD_PRELOAD : "${sqlcipher-signal}/lib/libsqlcipher.so"
        ${customLanguageWrapperArgs}
      )
  
  
negative.code: , hunspellDicts, spellcheckerLanguage ? null # E.g. "de_DE"
  # For a full list of available languages:
  # $ cat pkgs/development/libraries/hunspell/dictionaries.nix | grep "dictFileName =" | awk '{ print $3 }'
  }:
  
  let
  