Hi,
I'm trying to figure out why builtin modules are proxied from the host and not being required in the vm.

this is my setup currently:

const vm = new NodeVM({
        require: {
            external: true,
            context: 'sandbox',
            builtin: ['*'],
        },
    });

vm.run(...);

inside the VM I require an external module (axios if that matters) and in the chain of dependencies it requires another module (follow-redirects) that does this (more or less):

var Writable = require('stream').Writable;

function RedirectableRequest(options, responseCallback) {
// .....
}

RedirectableRequest.prototype = Object.create(Writable.prototype);

RedirectableRequest.prototype._performRequest = function () {  // <-------- this line breaks
// ..........
}

running this code inside the vm throws: TypeError: 'set' on proxy: trap returned falsish for property '_performRequest'.
The stream object is being proxied to the vm.

running this code when stream is being actually required inside the vm (by removing the if statement here: https://github.com/patriksimek/vm2/blob/master/lib/sandbox.js#L133) is working.

running node 6.10.3 on osx.

Thanks