diff --git a/Dockerfile b/Dockerfile
index 5d81ed1..7674992 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -54,6 +54,7 @@ RUN \
 # Patch to enable CUDA arguments for piper
 COPY patch/wyoming-piper_cuda.patch /tmp/
 RUN \
+    ls -l /app/lib; ls -l /app/lib/* &&\
     cd /app/lib/python3.10/dist-packages/wyoming_piper/ &&\
     patch -p0 < /tmp/wyoming-piper_cuda.patch