From 087c332638c578676422268df93c2b22aa45e8ae Mon Sep 17 00:00:00 2001
From: YuviPanda <yuvipanda@gmail.com>
Date: Sat, 8 Feb 2025 13:34:56 -0800
Subject: [PATCH] Specify what kinda list extra_buildx_build_args can be

---
 repo2docker/docker.py | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/repo2docker/docker.py b/repo2docker/docker.py
index e2eeac06..7fcbc31e 100644
--- a/repo2docker/docker.py
+++ b/repo2docker/docker.py
@@ -75,7 +75,7 @@ class DockerEngine(ContainerEngine):
     )
 
     extra_buildx_build_args = List(
-        [],
+        Unicode(),
         help="""
         Extra commandline arguments to pass to `docker buildx build` when building the image.
         """,