Location jupyterhub-proxy.pid

I’m trying to run jupyterhub as a service, but I’m running into some permission issues. I run the service with:

sudo start-stop-daemon --start --make-pidfile --pidfile /var/run/jupyterhub.pid --exec /local/miniconda3_test/bin/jupyterhub --chuid rhea:rhea -- --config=/etc/jupyterhub/jupyterhub_config.py --port 8000 --JupyterHub.spawner_class=sudospawner.SudoSpawner

Which results in the following:

[I 2019-06-18 08:49:23.398 JupyterHub app:2120] Using Authenticator: jupyterhub.auth.PAMAuthenticator-1.0.0
[I 2019-06-18 08:49:23.398 JupyterHub app:2120] Using Spawner: sudospawner.spawner.SudoSpawner
[I 2019-06-18 08:49:23.404 JupyterHub app:1257] Loading cookie_secret from /etc/jupyterhub/jupyterhub_cookie_secret
[I 2019-06-18 08:49:23.439 JupyterHub proxy:460] Generating new CONFIGPROXY_AUTH_TOKEN
[I 2019-06-18 08:49:23.487 JupyterHub app:1563] Not using whitelist. Any authenticated user will be allowed.
[I 2019-06-18 08:49:23.512 JupyterHub app:2337] Hub API listening on
[W 2019-06-18 08:49:23.513 JupyterHub proxy:642] Running JupyterHub without SSL.  I hope there is SSL termination happening somewhere else...
[I 2019-06-18 08:49:23.514 JupyterHub proxy:645] Starting proxy @ http://:8000
[C 2019-06-18 08:49:23.518 JupyterHub app:2349] Failed to start proxy
   Traceback (most recent call last):
     File "/local/miniconda3_test/lib/python3.7/site-packages/jupyterhub/app.py", line 2347, in start
       await self.proxy.start()
     File "/local/miniconda3_test/lib/python3.7/site-packages/jupyterhub/proxy.py", line 662, in start
     File "/local/miniconda3_test/lib/python3.7/site-packages/jupyterhub/proxy.py", line 562, in _write_pid_file
       with open(self.pid_file, "w") as f:
   PermissionError: [Errno 13] Permission denied: 'jupyterhub-proxy.pid'

I had another instance running with the same setup (same user, same config file), so I believe my configuration is correct. The problem seems to be that jupyterhub is clearly trying to write a file to some location where it does not have acces. However, I can’t figure out the full path of jupyterhub-proxy.pid.