From 3ca3b145ead9ce528b6b8cbf4db8e2a73a26bbe7 Mon Sep 17 00:00:00 2001
From: John Ericson <jericson@galois.com>
Date: Thu, 13 Oct 2016 11:02:56 -0400
Subject: [PATCH] top-level: Use foldl' to make the list of package functions
 top to bottom

---
 pkgs/top-level/default.nix | 16 ++++++++--------
 1 file changed, 8 insertions(+), 8 deletions(-)

diff --git a/pkgs/top-level/default.nix b/pkgs/top-level/default.nix
index d0dc231650c2..c54b23853c5d 100644
--- a/pkgs/top-level/default.nix
+++ b/pkgs/top-level/default.nix
@@ -101,15 +101,15 @@ let
     lib.optionalAttrs (bootStdenv == null)
       ((config.packageOverrides or (super: {})) super);
 
-  # The complete chain of package set builders, applied from bottom to top
-  toFix = lib.fold lib.extends (self: {}) [
-    configOverrides
-    stdenvOverrides
-    aliases
-    allPackages
-    stdenvDefault
-    trivialBuilders
+  # The complete chain of package set builders, applied from top to bottom
+  toFix = lib.foldl' (lib.flip lib.extends) (self: {}) [
     stdenvAdapters
+    trivialBuilders
+    stdenvDefault
+    allPackages
+    aliases
+    stdenvOverrides
+    configOverrides
   ];
 
   # Use `overridePackages` to easily override this package set.