@@ -203,7 +203,17 @@ def install(args):

 def ver(args):

     package_dir = args.package_directory

-    version_location = glob.glob(f"{package_dir}/**/_version.py")[0]

+    try:

+        version_location, = glob.glob(f"{package_dir}/**/_version.py", recursive=True)

+    except ValueError as err:

+        if "not enough" in str(err):

+            print(f"'_version.py' not found in '{package_dir}'", file=sys.stderr)

+            sys.exit(1)

+        elif "too many" in str(err):

+            print(f"More than 1 '_version.py' found in '{package_dir}'",  file=sys.stderr)

+            sys.exit(1)

+        else:

+            raise

     version_spec = spec_from_file_location("version", version_location)

     version = module_from_spec(version_spec)

     version_spec.loader.exec_module(version)