anchor.diff:  
     meta = with stdenv.lib; {
       description = "A hybrid image/package system. It uses OSTree as an image format, and uses RPM as a component model";
  -    homepage = https://rpm-ostree.readthedocs.io/en/latest/;
  +    homepage = "https://rpm-ostree.readthedocs.io/en/latest/";
       license = licenses.lgpl2Plus;
       maintainers = with maintainers; [ copumpkin ];
       platforms = platforms.linux;
  
positive.code:     })
    ];
  
    outputs = [ "out" "dev" "man" "devdoc" ];
    nativeBuildInputs = [
      pkgconfig which autoconf automake libtool cmake gperf cargo rustc
      gobject-introspection gtk-doc libxml2 libxslt docbook_xsl docbook_xml_dtd_42 docbook_xml_dtd_43
    ];
    buildInputs = [
      libcap ostree rpm glib systemd polkit bubblewrap
      json-glib libarchive libsolv librepo
      pcre check python
       # libdnf
      json_c libmodulemd_1 utillinux sqlite cppunit
    ];
  
    configureFlags = [
  
negative.code: { stdenv
  , fetchurl
  , ostree
  , rpm
  , which
  , autoconf
  , automake
  , libtool
  , pkgconfig
  , cargo
  , rustc
  , gobject-introspection
  , gtk-doc
  , libxml2
  , libxslt
  , docbook_xsl
  , docbook_xml_dtd_42
  , docbook_xml_dtd_43
  , gperf
  , cmake
  , libcap
  , glib
  , systemd
  , json-glib
  , libarchive
  , libsolv
  , librepo
  , polkit
  , bubblewrap
  , pcre
  , check
  , python
  , json_c
  , libmodulemd_1
  , utillinux
  , sqlite
  , cppunit
  , fetchpatch
  }:
  
  stdenv.mkDerivation rec {
    pname = "rpm-ostree";
    version = "2019.5";
  
    outputs = [ "out" "dev" "man" "devdoc" ];
  
    src = fetchurl {
      url = "https://github.com/projectatomic/${pname}/releases/download/v${version}/${pname}-${version}.tar.xz";
  