Error in index.js

[kittykatattack]

Hello,

With a fresh install of elm-webpack-starter, I'm getting the following errors when I run npm start:

 [78] ./src/static/index.js 442 bytes {0} [built] [1 error]

And

ERROR in ./src/elm/Main.elm
Module build failed: Error: Compiler process exited with error Compilation failed
elm-make: elm-stuff/build-artifacts: createDirectory: permission denied (Permission denied)

    at ChildProcess.<anonymous> (/Users/rvanderspuy/newspaper_interviw_18/node_modules/node-elm-compiler/index.js:257:27)
    at emitTwo (events.js:106:13)
    at ChildProcess.emit (events.js:191:7)
    at maybeClose (internal/child_process.js:877:16)
    at Socket.<anonymous> (internal/child_process.js:334:11)
    at emitOne (events.js:96:13)
    at Socket.emit (events.js:188:7)
    at Pipe._handle.close [as _onclose] (net.js:498:12)
 @ ./src/static/index.js 7:10-34

I'm on OSX (El Capitan) running node v.6.9.2 and npm v.3.10.9

Can anyone suggest what the problem might be?

[kittykatattack]

Oh, it was a permissions problem!
I needed to use:

sudo npm start

... but I'm not sure why I needed sudo.
Does anyone know?

[Oleksandr]

sudo chown -R username:groupname elm-stuff
npm run start