anchor.diff:      sha256 = "0zn8imqfa76bxpkpy111c4vn6vjarbxc8gqv6m18qkksk0ly26l1";
     };
   
  -  nativeBuildInputs = [ autoreconfHook docbook_xsl docbook_xml_dtd_42 libxslt.bin which ];
     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-gss"
  -    "--with-mailpath="
  -    "--with-ssl"
  -    "--with-sasl"
  -    "--with-curses"
       "--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"
  
positive.code: { stdenv, fetchFromGitHub, which, autoreconfHook, ncurses, perl
  , cyrus_sasl, gss, gpgme, kerberos, libidn, notmuch, openssl, lmdb, libxslt, docbook_xsl, docbook_xml_dtd_42 }:
  
  stdenv.mkDerivation rec {
    version = "20171013";
    name = "neomutt-${version}";
  
  
negative.code:   # like pgpring, pgpewrap, ...
    NIX_LDFLAGS = "-lidn";
  
    postInstall = ''
      cp ${muttWrapper} $out/bin/mutt
    '';
  
    meta = with stdenv.lib; {
      description = "A small but very powerful text-based mail client";
  