nativescript-angular uses a fork of the zone.js package in order to work around incompatibilities between node, browser, and mobile implementations.

The fork resides at https://github.com/NativeScript/zone.js in the zone-nativescript branch. It adds a separate lib/nativescript/nativescript.ts entry point that is used to generate a new bundle: dist/zone-nativescript.js.

To upgrade to a newer release of zone.js:

1. Identify the upgrade target -- most likely a release tag.
2. Rebase the zone-nativescript branch on top of the upgrade target.
3. Rebuild: gulp build
4. Run the node-based smoke tests: gulp test/nativescript
5. Run the browser tests: node_modules/.bin/karma start karma.conf.js --single-run (You need to run node test/ws-server.js in a separate console first)
6. Commit dist/zone-nativescript.js, drop the previous dist/zone-nativescript.js commit from the branch. Force push the new zone-nativescript branch to GitHub.
7. Update your copy of nativescript-angular/zone.js/dist/zone-nativescript.js with the bundle you just built.