From 6dbc6d43b5db21b01e2db7d59cdc3eb4ad83cd64 Mon Sep 17 00:00:00 2001
From: Daiderd Jordan <daiderd@gmail.com>
Date: Fri, 4 May 2018 19:12:43 +0200
Subject: [PATCH] nixpkgs: replace usage of deprecated traceValIfNot

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

diff --git a/modules/nix/nixpkgs.nix b/modules/nix/nixpkgs.nix
index f199807..dc95f91 100644
--- a/modules/nix/nixpkgs.nix
+++ b/modules/nix/nixpkgs.nix
@@ -30,7 +30,11 @@ let
 
   configType = mkOptionType {
     name = "nixpkgs config";
-    check = traceValIfNot isConfig;
+    check = x:
+      let traceXIfNot = c:
+            if c x then true
+            else lib.traceSeqN 1 x false;
+      in traceXIfNot isConfig;
     merge = args: fold (def: mergeConfig def.value) {};
   };