From b0e7fddc329eb7bb1f2c27e9d3f00795f2206f3f Mon Sep 17 00:00:00 2001
From: whitequark <whitequark@whitequark.org>
Date: Mon, 22 Feb 2016 13:16:43 +0000
Subject: [PATCH] lit: unbreak on non-conda.

---
 artiq/test/lit/lit.cfg | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/artiq/test/lit/lit.cfg b/artiq/test/lit/lit.cfg
index b52a4c752..08d1f44b5 100644
--- a/artiq/test/lit/lit.cfg
+++ b/artiq/test/lit/lit.cfg
@@ -19,7 +19,8 @@ else:
     python = sys.executable
 config.substitutions.append( ("%python", python) )
 
-config.environment["PYTHONPATH"] = os.getenv("PYTHONPATH")
+if os.getenv("PYTHONPATH"):
+    config.environment["PYTHONPATH"] = os.getenv("PYTHONPATH")
 
 not_ = "{} {}".format(sys.executable, os.path.join(root, "not.py"))
 config.substitutions.append( ("%not", not_) )