- $(PYTHON) -m pytest -k "not download"
-
-# XXX: This is hard to maintain
-CODE_FOLDERS = yt_dlp yt_dlp/downloader yt_dlp/extractor yt_dlp/postprocessor yt_dlp/compat yt_dlp/utils yt_dlp/dependencies
-yt-dlp: yt_dlp/*.py yt_dlp/*/*.py
+ $(PYTHON) -m pytest -Werror -m "not download"
+
+CODE_FOLDERS_CMD = find yt_dlp -type f -name '__init__.py' | sed 's,/__init__.py,,' | grep -v '/__' | sort
+CODE_FOLDERS != $(CODE_FOLDERS_CMD)
+CODE_FOLDERS ?= $(shell $(CODE_FOLDERS_CMD))
+CODE_FILES_CMD = for f in $(CODE_FOLDERS) ; do echo "$$f" | sed 's,$$,/*.py,' ; done
+CODE_FILES != $(CODE_FILES_CMD)
+CODE_FILES ?= $(shell $(CODE_FILES_CMD))
+yt-dlp: $(CODE_FILES)