From c27e7f9f52f5a22355bd13bc5efc27dac1737194 Mon Sep 17 00:00:00 2001
From: Santiago Martinez Balvanera <santiago.mbal@gmail.com>
Date: Mon, 4 May 2026 22:56:34 +0100
Subject: [PATCH] fix: ensure checkpoint is path

---
 src/batdetect2/train/checkpoints.py | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/src/batdetect2/train/checkpoints.py b/src/batdetect2/train/checkpoints.py
index ef69ca6..fa90973 100644
--- a/src/batdetect2/train/checkpoints.py
+++ b/src/batdetect2/train/checkpoints.py
@@ -34,6 +34,8 @@ def build_checkpoint_callback(
     if checkpoint_dir is None:
         checkpoint_dir = config.checkpoint_dir
 
+    checkpoint_dir = Path(checkpoint_dir)
+
     if experiment_name is not None:
         checkpoint_dir = checkpoint_dir / experiment_name