last version webpack-sources consuming source-map@0.6.1

[leoperetti]

$ npm install webpack-sources@2.0.0-beta.5
npm ERR! code ETARGET
npm ERR! notarget No matching version found for source-map@~0.6.1.
npm ERR! notarget In most cases you or one of your dependencies are requesting
npm ERR! notarget a package version that doesn't exist.
npm ERR! notarget
npm ERR! notarget It was specified as a dependency of 'webpack-sources'
npm ERR! notarget

It prevents me from creating new angular applications
Here paste my stack overflow post
https://es.stackoverflow.com/questions/304557/creating-new-angular-application

[hybrist]

This may be better as a report to webpack-sources or angular who can adjust their version ranges.