diff --git a/.drone.jsonnet b/.drone.jsonnet
index dd4e732..1a891a7 100644
--- a/.drone.jsonnet
+++ b/.drone.jsonnet
@@ -9,9 +9,9 @@ local Pipeline(mariadb_version) = {
       pull: "always",
       settings: {
         dockerfile: "Dockerfile",
-        build_args: {
-          MARIA_VERSION: mariadb_version,
-        },
+        build_args: [
+          "MARIA_VERSION=" + mariadb_version,
+        ],
         registry: "docker.asperti.com",
         repo: "docker.asperti.com/paspo/mariadb-backup-slave",
         username: {