No compatible version found: @angular/router@^2.0.0-rc.4 error while installing angular2 RC4 router

Question

I have package.json dependencies as follows:

"dependencies": {
    "@angular/common": "^2.0.0-rc.4",
    "@angular/compiler": "^2.0.0-rc.4",
    "@angular/core": "^2.0.0-rc.4",
    "@angular/http": "^2.0.0-rc.4",
    "@angular/platform-browser": "^2.0.0-rc.4",
    "@angular/platform-browser-dynamic": "^2.0.0-rc.4",
    "@angular/platform-server": "^2.0.0-rc.4",
    "@angular/router": "^2.0.0-rc.4",
    "angular2-jwt": "0.1.15",
    "es6-promise": "^3.2.1",
    "es6-shim": "^0.35.0",
    "jwt-decode": "^2.0.1",
    "reflect-metadata": "^0.1.2",
    "rxjs": "^5.0.0-beta.6",
    "zone.js": "^0.6.12"
  }

But while npm install it gives following error:

G:\rc4>npm i
npm ERR! Windows_NT 10.0.10586
npm ERR! argv "C:\\Program Files\\nodejs\\node.exe" "C:\\Program Files\\nodejs\\node_modules\\npm\\bin\\npm-cli.js" "i"                                         npm ERR! node v6.0.0                                                            npm ERR! npm  v3.8.6
npm ERR! No compatible version found: @angular/router@^2.0.0-rc.4
npm ERR! Valid install targets:
npm ERR! 3.0.0-beta.2, 3.0.0-beta.1, 3.0.0-alpha.8, 3.0.0-alpha.7, 3.0.0-alpha.6, 3.0.0-alpha.5, 3.0.0-alpha.4, 3.0.0-alpha.3, 3.0.0-alpha.2, 3.0.0-alpha.1, 3.0.0-alpha.0, 2.0.0-rc.2, 2.0.0-rc.1, 2.0.0-rc.0, 0.2.0, 0.1.0, 0.0.1, 0.0.0-7, 0.0.0-6, 0.0.0-5, 0.0.0-4, 0.0.0-3, 0.0.0-2, 0.0.0-1, 0.0.0-0
npm ERR!
npm ERR!
npm ERR! If you need help, you may report this error at:
npm ERR!     <https://github.com/npm/npm/issues>

npm ERR! Please include the following file with any support request:
npm ERR!     G:\rc4\npm-debug.log

G:\rc4>

Answer 1

angular-router has rc version till 3 like "@angular/router": "^2.0.0-rc.3",

After that version they release angular/router seperately as a beta version like

"@angular/router":"3.0.0-beta.2"

Answer 2

The most recent router version is 3.0.0-beta.2

https://github.com/angular/angular/blob/master/modules/%40angular/router/CHANGELOG.md