Trying to develop a forked project for use with Angular

I am trying to do a PR for ng2-pop-over . I first wanted to do a trivial test by putting console.log in ngOnInit

to see if I am building and npm link

locally locally, so I:

• forks and clones the project.
• ran npm i
  
  
• ran npm run build
  
  

And got a bunch of warnings like below.

⚠️   '@angular/common' is imported by dist/index.js, but could not be resolved – treating it as an external dependency
https://github.com/rollup/rollup/wiki/Troubleshooting#treating-module-as-external-dependency

⚠️   '@angular/core' is imported by dist/pop-over.component.js, but could not be resolved – treating it as an external dependency
https://github.com/rollup/rollup/wiki/Troubleshooting#treating-module-as-external-dependency

⚠️   'rxjs/Rx' is imported by dist/pop-over.component.js, but could not be resolved – treating it as an external dependency
https://github.com/rollup/rollup/wiki/Troubleshooting#treating-module-as-external-dependency

⚠️   '@angular/core' is imported by dist/pop-over-trigger.directive.js, but could not be resolved – treating it as an external dependency
https://github.com/rollup/rollup/wiki/Troubleshooting#treating-module-as-external-dependency

⚠️   'rxjs' is imported by dist/pop-over-trigger.directive.js, but could not be resolved – treating it as an external dependency
https://github.com/rollup/rollup/wiki/Troubleshooting#treating-module-as-external-dependency

⚠️   '@angular/core' is imported by dist/index.js, but could not be resolved – treating it as an external dependency
https://github.com/rollup/rollup/wiki/Troubleshooting#treating-module-as-external-dependency

⚠️   No name was provided for external module 'rxjs/Rx' in options.globals – guessing 'rxjs_Rx'

⚠️   No name was provided for external module 'rxjs' in options.globals – guessing 'rxjs'

      

        
        
        
      

    

• since these were warnings, I ignored them and did npm link
  
  
• In my project i did npm link ng2-pop-over
  
  
• angular didn't compile:

Failed to compile.

./~/ng2-pop-over/index.js
Module build failed: Error: ENOENT: no such file or directory, open '/Users/user1/Code/PopoverTest/node_modules/ng2-pop-over/index.js'
    at Error (native)
 @ ./src/app/app.module.ts 22:0-45
 @ ./src/main.ts
 @ multi webpack-dev-server/client?http://localhost:4200 ./src/main.ts 

      

        
        
        
      

    

What am I doing wrong?