Ember-CLI error on changing a CSS file

I'm trying out Ember-CLI, and have encountered my first obscure problem (there were others, but… they're fixed). On trying to save a change in the app.css file, this happens:

file changed styles/app.css
EEXIST, file already exists '/Users/admin/projects/saves/tmp/caching-writer-dest-dir_fjlhTg.tmp'
Error: EEXIST, file already exists '/Users/admin/projects/saves/tmp/caching-writer-dest-dir_fjlhTg.tmp'
    at Error (native)
    at Object.fs.symlinkSync (fs.js:852:18)
    at symlink (/Users/admin/projects/saves/node_modules/ember-cli/node_modules/symlink-or-copy/index.js:82:14)
    at Function.symlinkOrCopySync (/Users/admin/projects/saves/node_modules/ember-cli/node_modules/symlink-or-copy/index.js:58:5)
    at /Users/admin/projects/saves/node_modules/ember-cli/node_modules/broccoli-sourcemap-concat/node_modules/broccoli-caching-writer/index.js:103:21
    at lib$rsvp$$internal$$tryCatch (/Users/admin/projects/saves/node_modules/ember-cli/node_modules/promise-map-series/node_modules/rsvp/dist/rsvp.js:489:16)
    at lib$rsvp$$internal$$invokeCallback (/Users/admin/projects/saves/node_modules/ember-cli/node_modules/promise-map-series/node_modules/rsvp/dist/rsvp.js:501:17)
    at lib$rsvp$$internal$$publish (/Users/admin/projects/saves/node_modules/ember-cli/node_modules/promise-map-series/node_modules/rsvp/dist/rsvp.js:472:11)
    at lib$rsvp$asap$$flush (/Users/admin/projects/saves/node_modules/ember-cli/node_modules/promise-map-series/node_modules/rsvp/dist/rsvp.js:1290:9)
    at process._tickCallback (node.js:355:11)

The closest match I can find is this ember-cli issue.

Update and fix:

I tried the following:

rm -rf node_modules tmp dist && npm cache clean
ember install

But the issue persisted (after also trying the add rimraf to dependencies and doing npm install rimraf, now removed again).

The actual solution

Then it occurred to me that I needed to npm update ember-cli, then the above commands again, after which all is working now :-)

Solution

Update: As per raytiley's comments, the issue is not with rimraf, and the offender (broccoli-caching-writer) should be fixed soon. Therefore, at this time, Step 1 should not be necessary if you're experiencing this problem now.

See the comments in the Github Issue

This looks like a recent issue with dependencies, specifically rimraf. Currently, users are having success with this solution:

First, add this to your package.json file: (Not needed anymore)
```
"dependencies": {
  "rimraf": "2.2.8"
}
```
Secondly, type this into the command line to re-install your node items
```
rm -rf node_modules tmp dist && npm cache clean
ember install
```

Hope that helps!