Yes but how to tell npm your app doesn't run on Windows? Checking for win32 or other well-known Win-specific "process" property in your "build" npm script, and

Yes but how to tell npm your app doesn't run on Windows? Checking for win32 or other well-known Win-specific "process" property in your "build" npm script, and make it fail if it hasn't any of the expected valued? I'm guessing is-windows is idiomatically used for this exact purpose, and people not wanting to hard-code a heuristic for detecting Windows in their app. But then, I'm not sure third-party packages are available during execution of "build". The last time I had to deal with this, it didn't work out as I intended, and I ran out of time to find a robust, generally used idiom for this.