diff --git a/appveyor.yml b/appveyor.yml
index 89dc39b..24f95c7 100644
--- a/appveyor.yml
+++ b/appveyor.yml
@@ -1,4 +1,6 @@
 build: false
+matrix:
+  fast_finish: true     # immediately finish build once one of the jobs fails.
 
 environment:
   matrix: