diff --git a/standalone/windows/build.sh b/standalone/windows/build.sh
index cae8d78323..05d1d7e287 100644
--- a/standalone/windows/build.sh
+++ b/standalone/windows/build.sh
@@ -45,4 +45,5 @@ ghc --make Build/NullSoftInstaller.hs
 withcyg Build/NullSoftInstaller.exe
 
 # Test git-annex
+rm -rf .t
 withcyg dist/build/git-annex/git-annex.exe test