From 4ffa8b6125c83d6e49fbe3574edc053db7ea2ec1 Mon Sep 17 00:00:00 2001
From: John Ericson <Ericson2314@Yahoo.com>
Date: Tue, 22 May 2018 17:37:29 -0400
Subject: [PATCH] binutils: Do not needless redownload sources cascading more
 rebuilds

Unfortunately this is a crude hack that we use the same binutils source
everywhere in the bootstrap chain.
---
 pkgs/development/tools/misc/binutils/default.nix | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/pkgs/development/tools/misc/binutils/default.nix b/pkgs/development/tools/misc/binutils/default.nix
index fb780734bd7..db0908952dc 100644
--- a/pkgs/development/tools/misc/binutils/default.nix
+++ b/pkgs/development/tools/misc/binutils/default.nix
@@ -19,10 +19,11 @@ in
 stdenv.mkDerivation rec {
   name = targetPrefix + basename;
 
-  src = fetchurl {
+  # HACK to ensure that we preserve source from bootstrap binutils to not rebuild LLVM
+  src = stdenv.__bootPackages.binutils-unwrapped.src or (fetchurl {
     url = "mirror://gnu/binutils/${basename}.tar.bz2";
     sha256 = "028cklfqaab24glva1ks2aqa1zxa6w6xmc8q34zs1sb7h22dxspg";
-  };
+  });
 
   patches = [
     # Turn on --enable-new-dtags by default to make the linker set