diff --git a/bin/compile b/bin/compile
index c4beb52..386596e 100755
--- a/bin/compile
+++ b/bin/compile
@@ -88,7 +88,7 @@ fi
 
 # Install dependencies.
 echo "-----> Installing dependencies using pip version $(pip --version | awk '{print $2}')"
-pip install --use-mirrors -r requirements.txt -v | indent
+pip install --use-mirrors -r requirements.txt --src ./.heroku/src | indent
 
 # Django support.
 if [ "$NAME" = "Python/Django" ]; then