This package (deep-eql) is used in chai latest version as a dependency.
deep-eql package has a dependency from "karma": "^0.13.22"
Using even the latest(v3.0.1) version of the deep-eql package I am getting the following error:
lerna ERR! execute Error: Command failed: npm install
lerna ERR! execute npm WARN EBADENGINE Unsupported engine {
lerna ERR! execute npm WARN EBADENGINE package: '[email protected]',
lerna ERR! execute npm WARN EBADENGINE required: { node: '0.10 || 0.12 || 4 || 5' },
lerna ERR! execute npm WARN EBADENGINE current: { node: 'v16.13.1', npm: '8.1.2' }
lerna ERR! execute npm WARN EBADENGINE }
Please see also the screenshot:

My suggestion is to update karma version to a newer one that supports a higher version of the nodejs.