anchor.diff:    asterisk = asterisk_18;
   
     asterisk_13 = common {
  -    version = "13.37.0";
  -    sha256 = "09wc6cqh4f15wm62drzdppwvh7nwgnbwapvz1kgb0qdgixsshn3v";
  +    version = "13.37.1";
  +    sha256 = "1zc3104zw4y7i8bhhgrgy3snq0zr1904p64ykfc3ldh4xyfy3ld6";
       externals = {
         "externals_cache/pjproject-2.10.tar.bz2" = pjproject_2_10;
         "addons/mp3" = mp3-202;
  
positive.code:   };
  
    asterisk_16 = common {
      version = "16.14.0";
      sha256 = "1y120p4jlhg4iwihdxlk64y3y3n8w7y785lwqxsyqg6zviz0ghx6";
      externals = {
        "externals_cache/pjproject-2.10.tar.bz2" = pjproject_2_10;
        "addons/mp3" = mp3-202;
  
negative.code:   };
  
    asterisk_18 = common {
      version = "18.0.1";
      sha256 = "1kyly10pk7bpfqg3mjbvb8p795fnj9lvd29yp2xsxwgsqi1dn9p8";
      externals = {
        "externals_cache/pjproject-2.10.tar.bz2" = pjproject_2_10;
        "addons/mp3" = mp3-202;
  