diff --git a/.buildbot/winebuild/build.sh b/.buildbot/winebuild/build.sh
index 78c5c60b..75e60f1e 100755
--- a/.buildbot/winebuild/build.sh
+++ b/.buildbot/winebuild/build.sh
@@ -1,6 +1,6 @@
 #!/bin/sh
 
-xvfb-run -a buildscripts/winbuild.sh
+xvfb-run -a buildscripts/winbuild.sh || exit 1
 
 mkdir -p ../out
 mv packages/pyinstaller/dist/*.exe ../out