add var to handle staged binaries

bin/compile

@@ -42,6 +42,8 @@ export BUILD_DIR CACHE_DIR ENV_DIR
 VENDOR_URL="https://lang-python.s3.amazonaws.com/$STACK"
 if [[ -n ${BUILDPACK_VENDOR_URL:-} ]]; then
     VENDOR_URL="$BUILDPACK_VENDOR_URL"
+elif [[ -n ${USE_STAGING_BINARIES} ]]; then
+    VENDOR_URL="$USE_STAGING_BINARIES/$STACK"
 fi
 export VENDOR_URL
 

test/run-versions

@@ -4,8 +4,6 @@
 # shellcheck source=bin/default_pythons
 source "bin/default_pythons"
 
-assertCaptured "Installing SQLite3"
-
 testPythonDefault() {
   updateVersion "pythonDefault" $DEFAULT_PYTHON_VERSION
   compile "pythonDefault"