yarn install fails, though npm install doesn't

[Strangehill]

When running new, gatsby sees yarn present and it uses yarn over npm, failing after cloning the repo. The same applies to https://github.com/Vagr9K/gatsby-advanced-starter. So, while running npm install from the project directory fixes it, #33 does not in fact solve this issue because it's yarn.lock that needed the update all along.

error An unexpected error occurred: "/Users/cog/material/node_modules/sharp: Command failed.

[Vagr9K]

Thanks for the report!

Both repositories have now synced lockfiles and updated dependencies. Feel free to reopen if there is still an issue.