I am trying to mount an nfs share from my local network using qubesos. I know that the same configuration works on a different debian machine, but it doesn’t work under an app VM, creating the following error:

$ sudo mount -t nfs -o nfsvers=4.2 -o sec=krb5p <nfs share> /mnt/removable/ -vvv
mount.nfs: timeout set for Sat Mar 14 16:35:14 2026
mount.nfs: trying text-based options 'nfsvers=4.2,sec=krb5p,addr=10.206.0.206,clientaddr=10.137.0.9'
mount.nfs: mount(2): Invalid argument
mount.nfs: an incorrect mount option was specified for /mnt/removable

Is this a firewall issue somehow? I don’t see how that would happen, since nfs should work over the internet. I have installed nfs-utils to the template, but I’m not completely certain that’s actually what’s being used.