{ lib, noSysDirs, ... }:
res: pkgs: super:

with pkgs;
{
  # Here we select the default bintools implementations to be used.  Note when
  # cross compiling these are used not for this stage but the *next* stage.
  # That is why we choose using this stage's target platform / next stage's
  # host platform.
  #
  # Because this is the *next* stages choice, it's a bit non-modular to put
  # here. In theory, bootstraping is supposed to not be a chain but at tree,
  # where each stage supports many "successor" stages, like multiple possible
  # futures. We don't have a better alternative, but with this downside in
  # mind, please be judicious when using this attribute. E.g. for building
  # things in *this* stage you should use probably `stdenv.cc.bintools` (from a
  # default or alternate `stdenv`), at build time, and try not to "force" a
  # specific bintools at runtime at all.
  #
  # In other words, try to only use this in wrappers, and only use those
  # wrappers from the next stage.
  bintools-unwrapped =
    let
      inherit (stdenv.targetPlatform) linker;
    in
    if linker == "lld" then llvmPackages.bintools-unwrapped
    else if linker == "cctools" then darwin.binutils-unwrapped
    else if linker == "bfd" then binutils-unwrapped
    else if linker == "gold" then binutils-unwrapped.override { enableGoldDefault = true; }
    else null;
  bintoolsNoLibc = wrapBintoolsWith {
    bintools = bintools-unwrapped;
    libc = preLibcCrossHeaders;
  };
  bintools = wrapBintoolsWith {
    bintools = bintools-unwrapped;
  };

  bintoolsDualAs = wrapBintoolsWith {
    bintools = darwin.binutilsDualAs-unwrapped;
    wrapGas = true;
  };

  binutils-unwrapped = callPackage ./. {
    autoreconfHook = autoreconfHook269;
    # FHS sys dirs presumably only have stuff for the build platform
    noSysDirs = (stdenv.targetPlatform != stdenv.hostPlatform) || noSysDirs;
  };
  binutils-unwrapped-all-targets = callPackage ./. {
    autoreconfHook = if targetPlatform.isiOS then autoreconfHook269 else autoreconfHook;
    # FHS sys dirs presumably only have stuff for the build platform
    noSysDirs = (stdenv.targetPlatform != stdenv.hostPlatform) || noSysDirs;
    withAllTargets = true;
  };
  binutils = wrapBintoolsWith {
    bintools = binutils-unwrapped;
  };
  binutils_nogold = lowPrio (wrapBintoolsWith {
    bintools = binutils-unwrapped.override {
      enableGold = false;
    };
  });
  binutilsNoLibc = wrapBintoolsWith {
    bintools = binutils-unwrapped;
    libc = preLibcCrossHeaders;
  };

  libbfd = callPackage ./libbfd.nix { };
}