anchor.diff:      sha256 = "1n4d6fw3ffg051072hbxn106s52x2wlh5dh2kxwdfjsb5kh03ra3";
     };
   
  -  outputs = [ "out" "devdoc" "installedTests" ];
  +  outputs = [ "out" "devdoc" "man" "installedTests" ];
   
     nativeBuildInputs = [
       meson ninja gtk_doc pkgconfig gobjectIntrospection intltool glibcLocales shared_mime_info
  -    valgrind gcab docbook_xml_dtd_43 docbook_xsl docbook2x libxslt python wrapGAppsHook
  +    valgrind gcab docbook_xml_dtd_43 docbook_xsl help2man libxslt python wrapGAppsHook
     ];
     buildInputs = [
       polkit appstream-glib gusb sqlite libarchive libsoup elfutils libsmbios fwupdate libyaml
  
positive.code: { stdenv, fetchurl, fetchpatch, gtk_doc, pkgconfig, gobjectIntrospection, intltool
  , libgudev, polkit, appstream-glib, gusb, sqlite, libarchive, glib_networking
  , libsoup, docbook2x, gpgme, libxslt, elfutils, libsmbios, efivar, glibcLocales
  , fwupdate, libyaml, valgrind, meson, libuuid, colord, docbook_xml_dtd_43, docbook_xsl
  , ninja, gcab, gnutls, python3, wrapGAppsHook, json_glib
  , shared_mime_info, umockdev
  
negative.code:     (fetchpatch {
        url = https://github.com/hughsie/fwupd/commit/bd6082574989e4f48b66c7270bb408d439b77a06.patch;
        sha256 = "17pixyizkmn6wlsjmr1wwya17ivn770hdv9mp769vifxinya8w9y";
      })
      # drop docbook2man
      (fetchpatch {
        url = https://github.com/hughsie/fwupd/commit/2c43d3e6e65868b66a9a64a76123697e259ec7c2.patch;
        sha256 = "0vjv7jnai0g96frlipk2sc59pj3mhq9di01hajycjv7y5v6qqrmc";
      })
      # https://github.com/hughsie/fwupd/issues/405
      (fetchpatch {
  