From a0249ed425d7c7a357716736d489e6c187997566 Mon Sep 17 00:00:00 2001
From: "Ricardo M. Correia" <rcorreia@wizy.org>
Date: Fri, 24 Jul 2015 20:46:14 +0200
Subject: [PATCH] buildRustPackage: Fix rust builds due to #7524

Fixes #8966
---
 pkgs/build-support/rust/default.nix | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/pkgs/build-support/rust/default.nix b/pkgs/build-support/rust/default.nix
index cd19782e611..c23581d9601 100644
--- a/pkgs/build-support/rust/default.nix
+++ b/pkgs/build-support/rust/default.nix
@@ -44,7 +44,7 @@ in stdenv.mkDerivation (args // {
     export CARGO_HOME="$(realpath deps)"
 
     # Let's find out which $indexHash cargo uses for file:///dev/null
-    (cd $sourceRoot && cargo fetch &>/dev/null)
+    (cd $sourceRoot && cargo fetch &>/dev/null) || true
     cd deps
     indexHash="$(basename $(echo registry/index/*))"