anchor.diff: -{ stdenv, fetchgit, autoreconfHook, pkgconfig, ell, coreutils, readline, python3Packages }:
  +{ stdenv
  +, fetchgit
  +, fetchpatch
  +, autoreconfHook
  +, pkgconfig
  +, ell
  +, coreutils
  +, readline
  +, python3Packages
  +}:
   
   stdenv.mkDerivation rec {
     pname = "iwd";
  -
  -  version = "0.19";
  +  version = "0.20";
   
     src = fetchgit {
       url = https://git.kernel.org/pub/scm/network/wireless/iwd.git;
       rev = version;
  -    sha256 = "0848r06bnx5k6wlmy425hljc3f03x9xx0r83vdvf630jryc9llmz";
  +    sha256 = "03ca47d4hn28vkf5fr6ck1gz5py4lm1pw3nw9s1ckw7cqxw961sf";
     };
   
     nativeBuildInputs = [
  
positive.code: 
    buildInputs = [
      ell
      readline
      python3Packages.python
    ];
  
    pythonPath = [
  
negative.code:   ];
  
    configureFlags = [
      "--enable-external-ell"
      "--enable-wired"
      "--localstatedir=/var/"
      "--with-dbus-busdir=${placeholder "out"}/share/dbus-1/system-services/"
      "--with-dbus-datadir=${placeholder "out"}/share/"
      "--with-systemd-modloaddir=${placeholder "out"}/etc/modules-load.d/" # maybe
      "--with-systemd-unitdir=${placeholder "out"}/lib/systemd/system/"
    ];
  
    postUnpack = ''
  