Zigbee2MQTT 2.0 on Raspberry Pi Zero W 1.1 - pnpm issues/not found

[Terr4]

Hello,

I try to update my current Zigbee2MQTT installation to 2.0. Currently I am running Zigbee2MQTT 1.35.3 on a "Raspberry Pi Zero W Rev 1.1".

Based on the installation manual I tried update.sh and manually install pnpm but both tell me pnpm is not found :/

Here are my manual steps to install pnpm, no errors get reported, but it is not available:

/home/user# npm install -g pnpm

added 1 package in 30s

1 package is looking for funding
  run `npm fund` for details

/home/user# node --version
v20.18.1

/home/user# pnpm --version
bash: pnpm: command not found

I tried various commandline options to install pnpm globally that I found on slashdot but none made it available. Can anyone help? :/

corepack enable pnpm
npm i pnpm --global
npm install -g pnpm

I installed node.js with this script as it is not officially supported on a Rasperry Pi Zero W:
https://github.com/audstanley/NodeJs-Raspberry-Pi

UPDATE:
Ah I think I figured something out, I had to create some symlinks, it's doing something now.
Will report back if it runs now.

sudo ln -s /opt/nodejs/bin/pnpm /usr/bin/pnpm;
sudo ln -s /opt/nodejs/bin/pnpm /usr/sbin/pnpm;
sudo ln -s /opt/nodejs/bin/pnpm /sbin/pnpm;
sudo ln -s /opt/nodejs/bin/pnpm /usr/local/bin/pnpm;

UPDATE2:
The ./update.sh aborted because it ran out of memory during the build process, the Raspberry Pi Zero only has 512MB of RAM.
"FATAL ERROR: Reached heap limit Allocation failed - JavaScript heap out of memory"

I could fix this by setting max-old-space-size to 400MB for node.js:

cd /opt/zigbee2mqtt/
export NODE_OPTIONS=--max-old-space-size=400
./update.sh

Zigbee2MQTT is now successfully running on my Raspberry Pi Zero W 1.1 :)