Can't install through yarn add

[olafveerman]

The yarn install instructions from the Readme

$ yarn add http://github.com/developmentseed/ui-seed#v1.0.0

result in:

yarn add v0.24.6
[1/4] Resolving packages...
error Refusing to download the git repo {"protocol":"git:","hostname":"developmentseed","repository":"git://developmentseed/ui-seed.git"} over plain git without a commit hash
info Visit https://yarnpkg.com/en/docs/cli/add for documentation about this command.

This is related to: yarnpkg/yarn#2384