Cannot Find Module 'webpack-merge' on npm start

[ttecho]

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• I'm submitting a ...
  [x ] bug report
  [ ] feature request
  [ ] question about the decisions made in the repository
• Do you want to request a feature or report a bug?
  bug
• What is the current behavior?
  Cannot run 'npm run build:prod' or even 'npm start'
• If the current behavior is a bug, please provide the steps to reproduce and if possible a minimal demo of the problem via
  https://plnkr.co or similar (you can use this template as a starting point: http://plnkr.co/edit/tpl:AvJOMERrnz94ekVua0u5).

> webpack-dev-server --config config/webpack.dev.js --inline --progress --profile --colors --watch --display-error-details --display-cached --content-base src/

module.js:442
    throw err;
    ^

Error: Cannot find module 'webpack-merge'
    at Function.Module._resolveFilename (module.js:440:15)
    at Function.Module._load (module.js:388:25)
    at Module.require (module.js:468:17)
    at require (internal/module.js:20:19)
    at Object.<anonymous> (C:\Users\Projects\Project\ProjectUI_PCF\config\webpack.dev.js:6:22)
    at Module._compile (module.js:541:32)
    at Object.Module._extensions..js (module.js:550:10)
    at Module.load (module.js:458:32)
    at tryModuleLoad (module.js:417:12)
    at Function.Module._load (module.js:409:3)```
- **What is the expected behavior?**
  Should start the server
- **What is the motivation / use case for changing the behavior?**
  In order to develop we need this functionality
- **Please tell us about your environment:**
- Angular version: 2.0.0-beta.X
- Browser: all
- Windows 10
- **Other information** (e.g. detailed explanation, stacktraces, related issues, suggestions how to fix, links for us to have context, eg. stackoverflow, gitter, etc)

[mhheise]

Can you please try to run this? npm i -D webpack-merge

[PatrickJS]

can you update to node 6

[ashwinirajput]

mytasklist@1.0.0 start /Users/ashwini/Documents/mytasklist/client

webpack-dev-server --inline --progress --port 8080

module.js:327
throw err;
^

Error: Cannot find module './config/webpack.dev.js'