From b6e1cef6a5d0235a049b8d7606ebf053d8ab1516 Mon Sep 17 00:00:00 2001
From: tv <tv@krebsco.de>
Date: Tue, 11 Dec 2018 22:47:27 +0100
Subject: [PATCH] lib.normalize-ip6-addr: only normalize addrs w/o ::

---
 lib/default.nix | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/lib/default.nix b/lib/default.nix
index 54597e5fd..e352c7be9 100644
--- a/lib/default.nix
+++ b/lib/default.nix
@@ -107,7 +107,11 @@ let
           in
             a: concatStringsSep ":" (map f (splitString ":" a));
       in
-        a: toLower (group-zeros (drop-leading-zeros a));
+        a:
+          toLower
+            (if test ".*::.*" a
+              then a
+              else group-zeros (drop-leading-zeros a));
   };
 in