diff --git a/.travis.yml b/.travis.yml
index f8e7e93..d5449a3 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -1,5 +1,5 @@
 language: ruby
-dist: bionic
+dist: trusty
 sudo: required
 
 rvm:
diff --git a/bin/compile b/bin/compile
index 6e49277..dfc81d1 100755
--- a/bin/compile
+++ b/bin/compile
@@ -43,6 +43,7 @@ VENDOR_URL="https://lang-python.s3.amazonaws.com/$STACK"
 if [[ -n ${BUILDPACK_VENDOR_URL:-} ]]; then
     VENDOR_URL="$BUILDPACK_VENDOR_URL"
 fi
+export VENDOR_URL
 
 # Default Python Versions
 # shellcheck source=bin/default_pythons