Error building with npm plugin and lxd or multipass

snapcraft
4

This is the current (non functional) yaml.

name: polkadot-rpc-check
base: core20 
version: '0.1' 
summary: Nagios plugin to check polkadot rpc endpoint. 
description: |
  This is a nagios plugin to check a pokadot rpc endpoint.

grade: devel
confinement: devmode 

apps:
  check-substraterpc:
    command: bin/check-substraterpc
    plugs:
      - network
parts:
  check-node:
    source: .
    plugin: npm
    npm-node-version: "17.7.2"
    build-environment:
      - npm_config_unsafe_perm: 'true'
      - SUDO_UID: '0'
      - SUDO_GID: '0'
      - SUDO_USER: 'root'