anchor.diff: -{ stdenv, fetchFromGitHub, which, autoreconfHook, ncurses, perl
  +{ stdenv, fetchFromGitHub, which, autoreconfHook, writeScript, ncurses, perl
   , cyrus_sasl, gss, gpgme, kerberos, libidn, notmuch, openssl, lmdb, libxslt, docbook_xsl, docbook_xml_dtd_42 }:
   
  -stdenv.mkDerivation rec {
  +let
  +  muttWrapper = writeScript "mutt" ''
  +    #!${stdenv.shell} -eu
  +
  +    echo 'The neomutt project has renamed the main binary from `mutt` to `neomutt`.'
  +    echo ""
  +    echo 'This wrapper is provided for compatibility purposes only. You should start calling `neomutt` instead.'
  +    echo ""
  +    read -p 'Press any key to launch NeoMutt...' -n1 -s
  +    exec neomutt "$@"
  +  '';
  +
  +in stdenv.mkDerivation rec {
     version = "20171013";
     name = "neomutt-${version}";
   
  
positive.code:   # like pgpring, pgpewrap, ...
    NIX_LDFLAGS = "-lidn";
  
    configureScript = "./prepare";
  
    enableParallelBuilding = true;
  
    meta = with stdenv.lib; {
      description = "A small but very powerful text-based mail client";
  
negative.code:     sha256 = "0zn8imqfa76bxpkpy111c4vn6vjarbxc8gqv6m18qkksk0ly26l1";
    };
  
    buildInputs = [
      cyrus_sasl gss gpgme kerberos libidn ncurses
      notmuch openssl perl lmdb
    ];
  
    nativeBuildInputs = [ autoreconfHook docbook_xsl docbook_xml_dtd_42 libxslt.bin which ];
  
    enableParallelBuilding = true;
  
    postPatch = ''
      for f in doc/*.{xml,xsl}*  ; do
        substituteInPlace $f \
          --replace http://docbook.sourceforge.net/release/xsl/current     ${docbook_xsl}/share/xml/docbook-xsl \
          --replace http://www.oasis-open.org/docbook/xml/4.2/docbookx.dtd ${docbook_xml_dtd_42}/xml/dtd/docbook/docbookx.dtd
      done
    '';
  
    configureFlags = [
      "--enable-debug"
      "--enable-gpgme"
      "--enable-notmuch"
      "--with-curses"
      "--with-gss"
      "--with-homespool=mailbox"
      "--with-idn"
      "--with-lmdb"
      "--with-mailpath="
      "--with-sasl"
      "--with-ssl"
  
      # Look in $PATH at runtime, instead of hardcoding /usr/bin/sendmail
      "ac_cv_path_SENDMAIL=sendmail"
  