anchor.diff:    configureFlags =
       [ "--without-bash"
         "--without-systemd"
  +      "--disable-asciidoctor" # depends on ruby 2.7, use asciidoc instead
       ];
   
     patchPhase = ''
  
positive.code:   outputs = [ "out" "lib" "man" "dev" ];
  
    nativeBuildInputs =
      [ autoreconfHook asciidoctor pkg-config xmlto docbook_xml_dtd_45 docbook_xsl libxslt
        which
      ];
  
  
negative.code: { lib, stdenv, fetchFromGitHub, autoreconfHook
  , asciidoc, pkg-config, xmlto, docbook_xsl, docbook_xml_dtd_45, libxslt
  , json_c, kmod, which, util-linux, udev, keyutils
  }:
  
  