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npm install adding optional true on linux, not mac

What I Wanted to Do

I want to run npm install without it adding optional true to package-lock.json.

What Happened Instead

In development on mac it doesn’t add optional true, but in production on linux, it adds this.

Reproduction Steps

This issue has already been recognized, just trying to follow up on it.

Details

Platform Info

Dev: Mac, Prod: Ubuntu

$ npm --versions
6.4.1
$ node -p process.platform
dev: darwin
prod: linux


There was a (related) fix in npm 6.6.0 (commit). "optional": true should be there, but it isn’t always added on the first install. With this fix, it should be.