diff --git a/.github/scripts/find-unused-caches.py b/.github/scripts/find-unused-caches.py
index cbd645ab..cbeeb836 100644
--- a/.github/scripts/find-unused-caches.py
+++ b/.github/scripts/find-unused-caches.py
@@ -80,7 +80,24 @@ def main(repository: str, token: str, age_days: float = 7, output_file: str = "u
 
 
 if __name__ == "__main__":
-    from jsonargparse import auto_cli, set_parsing_settings
-
-    set_parsing_settings(parse_optionals_as_positionals=True)
-    auto_cli(main)
+    import logging
+
+    logging.basicConfig(level=logging.INFO)
+    try:
+        from jsonargparse import auto_cli, set_parsing_settings
+
+        set_parsing_settings(parse_optionals_as_positionals=True)
+        auto_cli(main)
+    except ImportError:
+        import sys
+
+        logging.warning(
+            "Expected `jsonargparse` is not installed,"
+            " using the native `sys.argv` parser with positional arguments only."
+            " Please install `pip install lightning_utilities[cli]` for better CLI experience."
+        )
+        cli_args = sys.argv[1:]
+        if len(cli_args) < 3:
+            logging.error("Expected at least 3 positional arguments: <repository> <token> <age_days> [<output_file>]")
+            sys.exit(1)
+        main(*cli_args)
diff --git a/scripts/adjust-torch-versions.py b/scripts/adjust-torch-versions.py
index b590cc68..d8a542f5 100644
--- a/scripts/adjust-torch-versions.py
+++ b/scripts/adjust-torch-versions.py
@@ -206,4 +206,14 @@ def main(requirements_path: str, torch_version: Optional[str] = None) -> None:
         set_parsing_settings(parse_optionals_as_positionals=True)
         auto_cli(main)
     except (ModuleNotFoundError, ImportError):
-        main(*sys.argv[1:])
+        logging.warning(
+            "Expected `jsonargparse` is not installed,"
+            " using the native `sys.argv` parser with positional arguments only."
+            " Please install `pip install lightning_utilities[cli]` for better CLI experience."
+        )
+        cli_args = sys.argv[1:]
+        if len(cli_args) < 1:
+            logging.error("Expected at least 1 positional argument: <requirements_path> [<torch_version>]")
+            sys.exit(1)
+        # Use sys.argv directly if jsonargparse is not available
+        main(*cli_args)
diff --git a/scripts/inject-selector-script.py b/scripts/inject-selector-script.py
index c2ec07c0..f6c203cf 100644
--- a/scripts/inject-selector-script.py
+++ b/scripts/inject-selector-script.py
@@ -44,4 +44,14 @@ def main(folder: str, selector_name: str) -> None:
         set_parsing_settings(parse_optionals_as_positionals=True)
         auto_cli(main)
     except (ModuleNotFoundError, ImportError):
-        main(*sys.argv[1:])
+        logging.warning(
+            "Expected `jsonargparse` is not installed,"
+            " using the native `sys.argv` parser with positional arguments only."
+            " Please install `pip install lightning_utilities[cli]` for better CLI experience."
+        )
+        cli_args = sys.argv[1:]
+        if len(cli_args) < 2:
+            logging.error("Expected at least 2 positional arguments: <folder> <selector_name>")
+            sys.exit(1)
+        # Use sys.argv directly if jsonargparse is not available
+        main(*cli_args)