anchor.diff:             stdenv.mkDerivation (rec {
   
       name = "uboot-${defconfig}-${version}";
  -    version = "2018.03";
  +    version = "2018.05";
   
       src = fetchurl {
         url = "ftp://ftp.denx.de/pub/u-boot/u-boot-${version}.tar.bz2";
  -      sha256 = "1z9x635l5164c5hnf7qs19w7j3qghbkgs7rpn673dm898i9pfx3y";
  +      sha256 = "0j60p4iskzb4hamxgykc6gd7xchxfka1zwh8hv08r9rrc4m3r8ad";
       };
   
       patches = [
         (fetchpatch {
  -        url = https://github.com/dezgeg/u-boot/commit/rpi-2017-11-patch1.patch;
  -        sha256 = "067yq55vv1slv4xy346px7h329pi14abdn04chg6s1s6hmf6c1x9";
  -      })
  -      (fetchpatch {
  -        url = https://github.com/dezgeg/u-boot/commit/rpi-2017-11-patch2.patch;
  -        sha256 = "0bbw0q027xvzvdxxvpzjajg4rm30a8mb7z74b6ma9q0l7y7bi0c4";
  +        url = https://github.com/dezgeg/u-boot/commit/rpi-2018-05-patch1.patch;
  +        sha256 = "0xvw16mp6mm36987rd5yb8bw0n5b3p1gq35wch2gbj15wx55450p";
  +      })
  +      (fetchpatch {
  +        url = https://github.com/dezgeg/u-boot/commit/rpi-2018-05-patch2.patch;
  +        sha256 = "0q1a5l5rfgddncxrjk59qr1f5587dwbvcf6z15bsfl2invs19m2b";
         })
         (fetchpatch {
           url = https://github.com/dezgeg/u-boot/commit/pythonpath-2018-03.patch;
  
positive.code:     hardeningDisable = [];
      dontStrip = false;
      extraMeta.platforms = stdenv.lib.platforms.linux;
      # build tools/kwboot
      extraMakeFlags = [ "CONFIG_KIRKWOOD=y" "CROSS_BUILD_TOOLS=1" "NO_SDL=1" "tools" ];
      postConfigure = ''
        sed -i '/CONFIG_SYS_TEXT_BASE/c\CONFIG_SYS_TEXT_BASE=0x00000000' .config
      '';
  
negative.code:   # Various changes for 64-bit sunxi boards, (hopefully) destined for 2018.05
    sunxiPatch = fetchpatch {
      name = "sunxi.patch";
      url = "https://github.com/u-boot/u-boot/compare/v2018.05...dezgeg:2018-05-sunxi.patch";
      sha256 = "1dfv4s1f71iv80vjxgyghv4pcwjv4mjphk75a8hfl3jdbpd66d36";
    };
  
    buildUBoot = { filesToInstall
  