Installing Angular Component Router through JSPM leads to mysterious 404 errors

Question

I have a JSPM/Typescript/Angular 1.5.3 project. I want to use a new component router . In my dir project, I used the command

 jspm install npm:@angular/router 

which is installed without errors. Then I added it to my app.ts file using

 import ngComponentRouter from 'jspm_packages/npm/@angular/ router@0.2.0 /angular1/angular_1_router' 

But when I start my lite-server , I get

 Failed to load resource: the server responded with a status of 404 (Not Found) http://localhost:3000/jspm_packages/npm/@angular/instruction.json Failed to load resource: the server responded with a status of 404 (Not Found) http://localhost:3000/jspm_packages/npm/@angular/utils.json Failed to load resource: the server responded with a status of 404 (Not Found) http://localhost:3000/jspm_packages/npm/@angular/url_parser.json 

I'm not sure why he wants to download these mysterious JSON files, so I checked my package.json package:

 { "jspm": { "name": "app", "dependencies": { "": "npm:@angular/ router@ ^0.2.0", "angular": "npm: angular@ ^1.5.3", 

Hmmm ... that empty "" doesn't look right. I feel that the build step is missing if JSPM cannot resolve the package name and the router requests JSON files. What am I doing wrong here?