pixi returns status 2 with no arguments

Dockerfile

@@ -13,7 +13,7 @@ WORKDIR $HOME/puppy
 
 # install puppy
 RUN curl -fsSL https://raw.githubusercontent.com/liquidcarbon/puppy/main/pup.sh | bash -s 3.12
-RUN pup
+RUN pup --help  # pixi returns status 2 with no arguments
 
 # setup app env
 RUN pup new appenv
@@ -24,4 +24,4 @@ RUN pixi run uv sync --project .
 
 # HELLO WORLD
 EXPOSE 7860
-CMD .venv/bin/python -m fetch
+CMD .venv/bin/python -m fetch