diff --git a/venv.sh b/venv.sh
index 9fb233e9c..8852a5ba0 100755
--- a/venv.sh
+++ b/venv.sh
@@ -5,7 +5,12 @@ if [ ! -d ".build" ]; then
     virtualenv .build --python $1
 fi
 
-. .build/bin/activate
+if [ -d ".build/bin" ]; then
+    source .build/bin/activate
+elif [ -d ".build/Scripts" ]; then
+    source .build/Scripts/activate
+fi
+
 python build.py prepare $3
 python build.py $2
 python build.py test