From 048be62484537633e2523dd4d200619649ff860d Mon Sep 17 00:00:00 2001
From: Shea Levy <shea@shealevy.com>
Date: Wed, 16 Jul 2014 01:11:24 -0400
Subject: [PATCH] Pass *_proxy vars to bootstrap fetchurl

---
 corepkgs/fetchurl.nix | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/corepkgs/fetchurl.nix b/corepkgs/fetchurl.nix
index 39b9dd50..4faedb14 100644
--- a/corepkgs/fetchurl.nix
+++ b/corepkgs/fetchurl.nix
@@ -34,4 +34,12 @@ derivation {
 
   # Don't build in a chroot because Nix's dependencies may not be there.
   __noChroot = true;
+
+  impureEnvVars = [
+    # We borrow these environment variables from the caller to allow
+    # easy proxy configuration.  This is impure, but a fixed-output
+    # derivation like fetchurl is allowed to do so since its result is
+    # by definition pure.
+    "http_proxy" "https_proxy" "ftp_proxy" "all_proxy" "no_proxy"
+  ];
 }