anchor.diff:    patches = [ ./docbook2texi.patch ];
   
     buildInputs = [curl openssl zlib expat gettext cpio makeWrapper]
  -    ++ # documentation tools
  -       [ asciidoc texinfo xmlto docbook2x
  +    ++ stdenv.lib.optionals withManual [ asciidoc texinfo xmlto docbook2x
            docbook_xsl docbook_xml_dtd_45 libxslt ]
       ++ stdenv.lib.optionals guiSupport [tcl tk];
   
  
positive.code:         notSupported $out/libexec/git-core/git-send-email "reinstall with config git = { sendEmailSupport = true } set"
         '')
  
     + ''# 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 ''
  
  
negative.code: , libxslt, tcl, tk, makeWrapper
  , svnSupport, subversionClient, perlLibs, smtpPerlLibs
  , guiSupport
  , withManual ? true
  , pythonSupport ? true
  , sendEmailSupport
  }:
  