"npm install" fails with "npm ERR! cb() never called!" on Homestead with NFS

Hi everyone,

When I attempt to run npm install inside a Homestead Vagrant box (6.3.0 + v7.18.0) with type: "nfs" on a freshly cloned Laravel 5.7.9 app, it fails with the following:

npm ERR! cb() never called!
npm ERR! This is an error with npm itself. Please report this error at:
npm ERR!     <https://npm.community>
npm ERR! A complete log of this run can be found in:
npm ERR!     /home/vagrant/.npm/_logs/2018-10-21T14_32_07_142Z-debug.log
The log file doesn't contain anything useful. The command just fails and gives no more information.
22805 timing npm Completed in 667470ms
22806 error cb() never called!
22807 error This is an error with npm itself. Please report this error at:
22808 error <https://npm.community>
VirtualBox (5.2.20-1) is my provider, Vagrant 2.1.5 with the vagrant-bindfs (1.1.0) plugin. Node v10.12.0, npm 6.4.1, Manjaro 18.0.0-rc Illyria.
The important thing is, when I leave out type: "nfs", it works.
I've tried destroying the box and re-provisioning, I've tried updating npm with sudo npm update -g, then npm cache clean --force, then npm install --no-bin-links, also npm install --no-package-lock. I've also tried setting various NFS mount options (['rw,vers=3,udp,nolock,actimeo=2']), all without success.
But then, without NFS, some of my bigger projects get slow as hell, basically unusable (10+ seconds page loads), so NFS is pretty much a must for me.
What do I do, can anyone please confirm this, and/or help? It's driving me insane, I've already wasted half a day attempting to fix this. Running the npm install command from my host of course works, but what's the point of Vagrant then, if I'm required to force other people to setup a local environment.
Thanks in advance for every input!