useYarn: true causes ember try:each to fail

[alexdiliberto]

Steps to reproduce:

# Create a new addon
ember addon test-addon --yarn

# Now add `useYarn: true` to `config/ember-try.js`

# Now test
yarn test

# ...Error on the first test run

...

=== Scenario: ember-lts-2.8 ====================================================

Error!
The command ember test exited Error: Cannot find module 'ember-cli' from '/Users/alexdiliberto/Repos/temp/test-addon'
undefined
error Command failed with exit code 1.

Remove useYarn: true and it works again

$ ember v --verbose
ember-cli: 2.15.0
http_parser: 2.7.0
node: 6.11.2
v8: 5.1.281.103
uv: 1.11.0
zlib: 1.2.11
ares: 1.10.1-DEV
icu: 58.2
modules: 48
openssl: 1.0.2l
os: darwin x64

[kategengler]

useYarn: true in not yet released. Did you specifically point to ember-cli/ember-try master?

[alexdiliberto]

@kategengler Agh oh, it's in the README. I just figured it was in stable release

[noslouch]

It's also printed out to the screen when running ember try:each with ember-cli 2.15.1.

[varoot]

Is this supposed to be working? I got the same error. My ember-try version is 0.2.17 according to yarn.lock. Ember CLI 2.16.2