anchor.diff:  
     postInstall = ''
       cp ${muttWrapper} $out/bin/mutt
  -    mv $out/share/doc/neomutt/mime.types $out/etc
       wrapProgram "$out/bin/neomutt" --prefix PATH : "$out/lib/neomutt"
     '';
   
  
positive.code: { stdenv, fetchFromGitHub, which, autoreconfHook, makeWrapper, writeScript,
  ncurses, perl , cyrus_sasl, gss, gpgme, kerberos, libidn, notmuch, openssl,
  lmdb, libxslt, docbook_xsl, docbook_xml_dtd_42 }:
  
  let
    muttWrapper = writeScript "mutt" ''
  
negative.code:   buildInputs = [
      cyrus_sasl gss gpgme kerberos libidn ncurses
      notmuch openssl perl lmdb
      mime-types
    ];
  
    nativeBuildInputs = [
  