Cannot import InMemoryDataService / Cannot install Rxjs

I’m installing angular-in-memory-web-api, npm output these errors:

ionic-hello-world@ /home/edxz/Documents/projects/ionic2
├── angular-in-memory-web-api@0.2.4 
└── UNMET PEER DEPENDENCY rxjs@5.0.0-beta.12

npm WARN optional SKIPPING OPTIONAL DEPENDENCY: fsevents@^1.0.0 (node_modules/chokidar/node_modules/fsevents):
npm WARN notsup SKIPPING OPTIONAL DEPENDENCY: Unsupported platform for fsevents@1.1.1: wanted {"os":"darwin","arch":"any"} (current: {"os":"linux","arch":"x64"})
npm WARN @angular/core@2.2.1 requires a peer of rxjs@5.0.0-beta.12 but none was installed.
npm WARN @angular/http@2.2.1 requires a peer of rxjs@5.0.0-beta.12 but none was installed.
npm WARN ionic-angular@2.0.0-rc.5 requires a peer of rxjs@5.0.0-beta.12 but none was installed.

When I tried to run:

$ npm i rxjs --save

it throws this error

ionic-hello-world@ /home/edxz/Documents/projects/ionic2
└── UNMET PEER DEPENDENCY rxjs@5.1.1

npm WARN optional SKIPPING OPTIONAL DEPENDENCY: fsevents@^1.0.0 (node_modules/chokidar/node_modules/fsevents):
npm WARN notsup SKIPPING OPTIONAL DEPENDENCY: Unsupported platform for fsevents@1.1.1: wanted {"os":"darwin","arch":"any"} (current: {"os":"linux","arch":"x64"})
npm WARN @angular/core@2.2.1 requires a peer of rxjs@5.0.0-beta.12 but none was installed.
npm WARN @angular/http@2.2.1 requires a peer of rxjs@5.0.0-beta.12 but none was installed.
npm WARN ionic-angular@2.0.0-rc.5 requires a peer of rxjs@5.0.0-beta.12 but none was installed.
npm ERR! code 1

I’ve tried running npm cache clear but its not solving this issue

I checked the node_modules folder, the angular-in-memory-web-api folder is there but I cannot find the InMemoryDbService class so I cannot import it.

what can I do to fix it? I need to use InMemoryDbService for my app while waiting for the backend to be finished.

Isn’t that intended for Angular1?

based on the description here, it is deprecated in favor of the angular repo: https://github.com/angular/in-memory-web-api

solved by running global update on all dependencies by using npm-check-updates module.