anchor.diff:  , libxslt, tcl, tk, makeWrapper
   , svnSupport, subversionClient, perlLibs, smtpPerlLibs
   , guiSupport
  +, withManual ? true
   , pythonSupport ? true
   , sendEmailSupport
   }:
  
positive.code:   patches = [ ./docbook2texi.patch ];
  
    buildInputs = [curl openssl zlib expat gettext cpio makeWrapper]
      ++ # documentation tools
         [ asciidoc texinfo xmlto docbook2x
           docbook_xsl docbook_xml_dtd_45 libxslt ]
      ++ stdenv.lib.optionals guiSupport [tcl tk];
  
  
negative.code:         notSupported $out/libexec/git-core/git-send-email "reinstall with config git = { sendEmailSupport = true } set"
         '')
  
     + stdenv.lib.optionalString withManual ''# Install man pages and Info manual
         make -j $NIX_BUILD_CORES -l $NIX_BUILD_CORES PERL_PATH="${perl}/bin/perl" cmd-list.made install install-info \
           -C Documentation ''
  
  