From ee0282081618c67f57ef6e9eed3233bb92719d29 Mon Sep 17 00:00:00 2001
From: John MacFarlane <jgm@berkeley.edu>
Date: Mon, 24 Sep 2018 12:19:42 -0700
Subject: [PATCH] Fix appveyor.yaml env variable.

---
 appveyor.yml | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/appveyor.yml b/appveyor.yml
index 956b6ab29..10e89e8d2 100644
--- a/appveyor.yml
+++ b/appveyor.yml
@@ -60,7 +60,7 @@ build: off
 
 install:
   - choco install wixtoolset %CHOCO_OPTS%
-  - if test "BUILD_TYPE" = stack
+  - if test "$BUILD_TYPE" = stack
     then
       choco install haskell-stack %CHOCO_OPTS%
     else