I discovered an issue describing my current problem: ttps://systemjs/systemjs#374 where they suspect that not SystemJs but babel is the culprit and in babel/babel#1022 they declare systemjs as the culprot with no follow-up issue
I'm using jspm 0.15.1 with System.Js 0.16.4 in my current test setup which should have the fix contained but I'm still running into the issue
Thx @guybedford , that of course solved the problem. I did a npm update and jspm update beforehand, but with all the recent jspm-cli and systemJS releases in such a short timeframe I think I will delete all my config/package.json-files the next time before I try an update..., sorry about that
Would it be hard to somehow load deps from npm instead of jspm with systemjs? (using the node_modules folder structure)? Im trying to run tests with mocha's babel/register flag, which makes es6 to cjs.