anchor.diff:  
     nativeBuildInputs = [ meson ninja which python ];
   
  +  buildInputs = [ libiconv ];
  +
     meta = with stdenv.lib; {
       description = "KornShell Command And Programming Language";
       longDescription = ''
         The KornShell language was designed and developed by David G. Korn at
         AT&T Bell Laboratories. It is an interactive command language that
         provides access to the UNIX system and to many other systems, on the
  -      many different computers and workstations on which it is implemented. 
  +      many different computers and workstations on which it is implemented.
       '';
       homepage = https://github.com/att/ast;
       license = licenses.cpl10;
  
positive.code: { stdenv, meson, ninja, fetchFromGitHub, which, python }:
  
  stdenv.mkDerivation rec {
    name = "ksh-${version}";
  
negative.code:     shellPath = "/bin/ksh";
    };
  }
  