diff --git a/swh/vault/cli.py b/swh/vault/cli.py
index 631ba0e..ffc6617 100644
--- a/swh/vault/cli.py
+++ b/swh/vault/cli.py
@@ -1,92 +1,85 @@
-import os
+# Copyright (C) 2015-2020  The Software Heritage developers
+# See the AUTHORS file at the top-level directory of this distribution
+# License: GNU General Public License version 3, or any later version
+# See top-level LICENSE file for more information
+
+# WARNING: do not import unnecessary things here to keep cli startup time under
+# control
 import logging
 
 import click
 
-from swh.core.config import SWH_CONFIG_DIRECTORIES, SWH_CONFIG_EXTENSIONS
 from swh.core.cli import CONTEXT_SETTINGS, AliasedGroup
 
-from swh.vault.api.server import make_app_from_configfile, DEFAULT_CONFIG_PATH
-
-CFG_HELP = """Software Heritage Vault RPC server.
-
-If the CONFIGFILE option is not set, the default config file search will
-be used; first the SWH_CONFIG_FILENAME environment variable will be
-checked, then the config file will be searched in:
 
-%s""" % (
-    "\n\n".join(
-        "- %s(%s)"
-        % (os.path.join(d, DEFAULT_CONFIG_PATH), "|".join(SWH_CONFIG_EXTENSIONS))
-        for d in SWH_CONFIG_DIRECTORIES
-    )
-)
+CFG_HELP = """Software Heritage Vault RPC server."""
 
 
 @click.group(name="vault", context_settings=CONTEXT_SETTINGS, cls=AliasedGroup)
 @click.pass_context
 def vault(ctx):
     """Software Heritage Vault tools."""
     pass
 
 
 @vault.command(name="rpc-serve", help=CFG_HELP)
 @click.option(
     "--config-file",
     "-C",
     default=None,
     metavar="CONFIGFILE",
     type=click.Path(exists=True, dir_okay=False,),
     help="Configuration file.",
 )
 @click.option(
     "--no-stdout", is_flag=True, default=False, help="Do NOT output logs on the console"
 )
 @click.option(
     "--host",
     default="0.0.0.0",
     metavar="IP",
     show_default=True,
     help="Host ip address to bind the server on",
 )
 @click.option(
     "--port",
     default=5005,
     type=click.INT,
     metavar="PORT",
     help="Binding port of the server",
 )
 @click.option(
     "--debug/--no-debug",
     default=True,
     help="Indicates if the server should run in debug mode",
 )
 @click.pass_context
 def serve(ctx, config_file, no_stdout, host, port, debug):
     import aiohttp
     from swh.scheduler.celery_backend.config import setup_log_handler
+    from swh.vault.api.server import make_app_from_configfile
 
     ctx.ensure_object(dict)
     setup_log_handler(
         loglevel=ctx.obj.get("log_level", logging.INFO),
         colorize=False,
         format="[%(levelname)s] %(name)s -- %(message)s",
         log_console=not no_stdout,
     )
 
     try:
         app = make_app_from_configfile(config_file, debug=debug)
     except EnvironmentError as e:
         click.echo(e.msg, err=True)
         ctx.exit(1)
 
     aiohttp.web.run_app(app, host=host, port=int(port))
 
 
 def main():
     logging.basicConfig()
     return serve(auto_envvar_prefix="SWH_VAULT")
 
 
 if __name__ == "__main__":
     main()