diff --git a/.drone.jsonnet b/.drone.jsonnet
index 9a8c310..fa1036f 100644
--- a/.drone.jsonnet
+++ b/.drone.jsonnet
@@ -9,9 +9,9 @@ local Pipeline(os, release) = {
       pull: "always",
       settings: {
         dockerfile: "Dockerfile",
-        build_args: {
-          BUILD_FROM: os + ":" + release,
-        },
+        build_args: [
+          "BUILD_FROM=" + os + ":" + release,
+        ],
         registry: "docker.asperti.com",
         repo: "docker.asperti.com/paspo/docker-deb-builder",
         username: {
diff --git a/Dockerfile b/Dockerfile
index d20c3fa..c5e533b 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -1,4 +1,4 @@
-ARG BUILD_FROM=debian:bullseye
+ARG BUILD_FROM
 FROM ${BUILD_FROM}
 
 RUN \