diff --git a/bin/compile b/bin/compile
index 0afdab9e20f22695e05a92c3a6e57f1a4f2c19e7..759b9419a24b62acfb81cde8d478b7e2529fbfa4 100755
--- a/bin/compile
+++ b/bin/compile
@@ -164,6 +164,7 @@ if [ ! $STACK = $CACHED_PYTHON_STACK ]; then
   bpwatch start uninstall_python
     puts-step "Stack changed, re-installing $PYTHON_VERSION."
     rm -fr .heroku/python
+    SKIP_INSTALL=0
   bpwatch stop uninstall_python
 fi