pnpm complaining about root .npmrc, that to incorrectly

[CxRes]

pnpm version: 5.16.0

Code to reproduce the issue:

.npmrc file at root

# pnpm options
link-workspace-packages = deep
shared-workspace-lockfile = false
recursive-install = false
pnpmfile = 'pnpmfile.cjs'

# nwjs options
nwjs_build_type = sdk

run in a sub-repo (a folder with its own package.json)

> pnpm why <some_package>

Expected behavior:

pnpm why should list why for the subrepo.
and
it should not bother about settings it does not understand.

Actual behavior:

 WARN  Your .npmrc file contains unknown setting: nwjs_build_type

Additional information:

• node -v prints: v14.15.4
• Windows, macOS, or Linux?: Windows 10 x64