From 6078f094c638faabc63cffe285dc91af4e04a741 Mon Sep 17 00:00:00 2001
From: John Ericson <John.Ericson@Obsidian.Systems>
Date: Mon, 30 Dec 2019 18:09:45 -0500
Subject: [PATCH] pkgs/stdenv/booter.nix: Add comment explaining hasCC trickery

---
 pkgs/stdenv/booter.nix | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/pkgs/stdenv/booter.nix b/pkgs/stdenv/booter.nix
index 8a5746522049..51d617354e86 100644
--- a/pkgs/stdenv/booter.nix
+++ b/pkgs/stdenv/booter.nix
@@ -126,7 +126,11 @@ stageFuns: let
         if buildPackages.stdenv.cc.isClang or false
         then buildPackages.clang
         else buildPackages.gcc
-      else buildPackages.stdenv.cc;
+      else
+        # This will blow up if anything uses it, but that's OK. The `if
+        # buildPackages.stdenv.cc.isClang then ... else ...` would blow up
+        # everything, so we make sure to avoid that.
+        buildPackages.stdenv.cc;
   };
 
 in dfold folder postStage (_: {}) withAllowCustomOverrides