anchor.diff:  { stdenv
   , fetchurl
  +, lib
   , unzip
   }:
   
  
positive.code:   name = "amrnb-11.0.0.0";
  
    # http://www.3gpp.org/DynaReport/26104.htm
    # NOTE: When updating amrnb-3gpp, update every instance of 26104-d00 to the
    #       updated file name.
    amrnb_3gpp = fetchurl {
      # Rel-13
      url = "http://www.3gpp.org/ftp/Specs/archive/26_series/26.104/26104-d00.zip";
      multihash = "QmWFJTCdcERKsPwkkWLGhRhz54QEosYWmVJpxTkKw3CFuh";
      sha256 = "d5447f8a672243dd9db32ba64fd69181da725cac1f7b347c0af95d9949a47619";
    };
  
    src = fetchurl {
  
negative.code:     sed -i Makefile.{in,am} \
        -i configure{,.ac} \
        -i prepare_sources.sh.in \
        -e 's/26104-b00/26104-e00/g'
    '';
  
    configureFlags = [
  