Node_modules folder in ng2-ion-range-slider

[gentle9]

When I install ng2-ion-range-slider with yarn there is a node_modules folder created in the ng2-ion-range-slider folder (node_modules/ng2-ion-range-slider/node_modules) and because of that the build fails with Cannot redeclare block-scoped variable 'ngDevMode'.
After deleting the folder manually the build works without problems.

Angular 5.2.9 and cli 1.7.3

[mdklab]

Looks like duplicate of #13
I'm using this command in my build script:
rm -rf ./node_modules/ng2-ion-range-slider/node_modules

also, .idea folder is not necessary too

[PhilippStein]

Close as duplicate of #13