anchor.diff:    meta = with lib; {
       homepage = "http://www.syslinux.org/";
       description = "A lightweight bootloader";
  -    license = licenses.gpl2;
  +    license = licenses.gpl2Plus;
       maintainers = [ maintainers.samueldr ];
       platforms = [ "i686-linux" "x86_64-linux" ];
     };
  
positive.code: { lib, stdenv, fetchgit, fetchurl, fetchpatch, nasm, perl, python3, libuuid, mtools, makeWrapper }:
  
  stdenv.mkDerivation {
    pname = "syslinux";
    version = "unstable-20190207";
  
    # This is syslinux-6.04-pre3^1; syslinux-6.04-pre3 fails to run.
    # Same issue here https://www.syslinux.org/archives/2019-February/026330.html
    src = fetchgit {
      url = "https://repo.or.cz/syslinux";
      rev = "b40487005223a78c3bb4c300ef6c436b3f6ec1f7";
      sha256 = "1acf6byx7i6vz8hq6mra526g8mf7fmfhid211y8nq0v6px7d3aqs";
      fetchSubmodules = true;
    };
  
    patches = let
      mkURL = commit: patchName:
        "https://salsa.debian.org/images-team/syslinux/raw/${commit}/debian/patches/"
        + patchName;
    in [
      (fetchurl {
        url = mkURL "fa1349f1" "0002-gfxboot-menu-label.patch";
        sha256 = "06ifgzbpjj4picpj17zgprsfi501zf4pp85qjjgn29i5rs291zni";
      })
      (fetchurl {
        url = "https://raw.githubusercontent.com/archlinux/svntogit-packages/821c3da473d1399d930d5b4a086e46a4179eaa45/trunk/0005-gnu-efi-version-compatibility.patch";
        name = "0005-gnu-efi-version-compatibility.patch";
        sha256 = "1mz2idg8cwn0mvd3jixxynhkn7rhmi5fp8cc8zznh5f0ysfra446";
      })
      (fetchurl {
        url = "https://raw.githubusercontent.com/archlinux/svntogit-packages/821c3da473d1399d930d5b4a086e46a4179eaa45/trunk/0025-reproducible-build.patch";
        name = "0025-reproducible-build.patch";
        sha256 = "0qk6wc6z3648828y3961pn4pi7xhd20a6fqn6z1mnj22bbvzcxls";
      })
      (fetchurl {
        # mbr.bin: too big (452 > 440)
        # https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=906414
        url = mkURL "7468ef0e38c43" "0016-strip-gnu-property.patch";
        sha256 = "17n63b8wz6szv8npla1234g1ip7lqgzx2whrpv358ppf67lq8vwm";
      })
      (fetchurl {
        # mbr.bin: too big (452 > 440)
        url = mkURL "012e1dd312eb" "0017-single-load-segment.patch";
        sha256 = "0azqzicsjw47b9ppyikhzaqmjl4lrvkxris1356bkmgcaiv6d98b";
      })
      (fetchurl {
        url = mkURL "26f0e7b2" "0018-prevent-pow-optimization.patch";
        sha256 = "1c8g0jz5yj9a0rsmryx9vdjsw4hw8mjfcg05c9pmyjg85w3dfp3m";
      })
      ./gcc10.patch
    ];
  
    postPatch = ''
  
negative.code:     touch gnu-efi/inc/ia32/gnu/stubs-32.h
    '';
  
    nativeBuildInputs = [
      nasm
      perl
      python3
      makeWrapper
    ];
  
    buildInputs = [
      libuuid
    ];
  
    # Fails very rarely with 'No rule to make target: ...'
    enableParallelBuilding = false;
  
    hardeningDisable = [ "pic" "stackprotector" "fortify" ];
  
    stripDebugList = [ "bin" "sbin" "share/syslinux/com32" ];
  