anchor.diff:  { stdenv
   , fetchurl
  +, lib
   , unzip
   }:
   
  
positive.code:     sed -i Makefile.{in,am} \
        -i configure{,.ac} \
        -i prepare_sources.sh.in \
        -e 's/26204-b00/26204-d10/g'
    '';
  
    configureFlags = [
  
negative.code:   name = "amrwb-11.0.0.0";
  
    # http://www.3gpp.org/DynaReport/26204.htm
    # NOTE: When updating amrwb-3gpp, update every instance of 26204-e10 to the
    #       updated file name.
    amrwb_3gpp = fetchurl {
      # Rel-14.1
      url = http://www.3gpp.org/ftp/Specs/archive/26_series/26.204/26204-e10.zip;
      multihash = "QmeAnGzpXFmjkowDLJCMPfG6Tfa3yUw5QyyECamJEvKgV2";
      sha256 = "68cfe06d38eda2ab12a194175d62ef1cee9327a99e98b24dbad9e84545bd7f2b";
    };
  
    src = fetchurl {
  