parallels-guest.nix clipboard intermittently broken

[jamesla]

Describe the bug

Two copies of parallels clipboard manager daemon prlcp are started when installing parallels guest tools via the following:

hardware.parallels = {
  enable = true;
};

This creates a race condition with the clipboard which is both slow and non-performant as well as sometimes not copying or pasting and requiring you to hit copy or paste twice.

Temporary workaround appears to be:

ps -A | grep prlcp
kill %id of second prlcp%

I am unsure how to resolve in the nix package so posting it here.

I've also reproduced this on a seperate fresh machine that has nothing installed but nixos and prltools.`

Duplicate processes here:

[jamesla]

@wegank @catap any ideas on this one?