diff --git a/.drone-home.jsonnet b/.drone-home.jsonnet
index 4743066..3a2a3f0 100644
--- a/.drone-home.jsonnet
+++ b/.drone-home.jsonnet
@@ -200,7 +200,7 @@ local images = {
               settings +: {
                 script +: [
                   "export D=${DRONE_COMMIT}",
-                  "export O=${O}",
+                  "export O=$${O}",
                   "export %(env)s='${%(env)s}'" % {
                     env: util.environment(s),
                   },