Some dependencies none was installed

[krivochenko]

I clone this repo and run npm install --registry http://registry.npmjs.org/
In the end I got warnings:

nodejs_1  | npm WARN optional SKIPPING OPTIONAL DEPENDENCY: fsevents@^1.0.0 (node_modules/chokidar/node_modules/fsevents):
nodejs_1  | npm WARN notsup SKIPPING OPTIONAL DEPENDENCY: Unsupported platform for fsevents@1.1.1: wanted {"os":"darwin","arch":"any"} (current: {"os":"linux","arch":"x64"})
nodejs_1  | npm WARN @angular/platform-server@4.1.0-beta.0-c6917d9 requires a peer of @angular/animations@4.1.0-beta.0-c6917d9 but none was installed.
nodejs_1  | npm WARN @angular/core@4.1.0-beta.0-c6917d9 requires a peer of zone.js@^0.8.4 but none was installed.
nodejs_1  | npm WARN ng-universal-demo@1.0.0 No description

As I know, I can skip warnings about optional dependencies. But what about @angular/animations@4.1.0-beta.0-c6917d9 and zone.js@^0.8.4

[krivochenko]

I use NPM 4.1.2 and Node 7.7.3