From 20d846bcdd42698004a16f8ef1f181f1e102742d Mon Sep 17 00:00:00 2001
From: Eelco Dolstra <edolstra@gmail.com>
Date: Wed, 3 May 2017 17:39:43 +0200
Subject: [PATCH] nixUnstable.perlBindings: Fix Nix::Config generation

The configure script calls nix-instantiate, which fails if /nix/var
doesn't exist (e.g. in a sandbox). This caused a bogus Nix::Config
module to be generated, causing issues in Hydra.
---
 pkgs/tools/package-management/nix/default.nix | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/pkgs/tools/package-management/nix/default.nix b/pkgs/tools/package-management/nix/default.nix
index ffac378eaf71..b688d2196865 100644
--- a/pkgs/tools/package-management/nix/default.nix
+++ b/pkgs/tools/package-management/nix/default.nix
@@ -116,9 +116,10 @@ let
     configureFlags =
       [ "--with-dbi=${perlPackages.DBI}/${perl.libPrefix}"
         "--with-dbd-sqlite=${perlPackages.DBDSQLite}/${perl.libPrefix}"
-        "--with-www-curl=${perlPackages.WWWCurl}/${perl.libPrefix}"
       ];
 
+    preConfigure = "export NIX_STATE_DIR=$TMPDIR";
+
     preBuild = "unset NIX_INDENT_MAKE";
   };