Library sources not found for scala-library in Intellij

Question

I have an imported sbt project. During import I did NOT click on download sbt sources - and I am unclear as to whether that were the cause of the subsequent issue. In any case is there a way to remedy the missing library as shown in the screenshot?

Clicking on "Download" results in the "Library sources aren't found" as seen above.

Update From an answer below: Going to Other settings|default settings|Build, Execution, Deployment|build tools|SBT Here is what I see:

Another update I went to the Intellij Idea|Preferences|Execution,Deployment,Build and see the following

Note: even after checking Download sbt docs and sources it does not "take": it remains unchecked the next time the dialog is brought up.

Answer 1

File -> Settings -> Build, Execution, Deployment -> Build Tools -> SBT, check the "Download sources and Docs". open the SBT panel, and click refresh. Voila.

Answer 2

I'm constantly fighting Intellij on Windows (across different versions and updates... mostly EAP, so it's probably my fault), but if I add withSources() withJavadoc() to the end of a library dependency:

libraryDependencies ++= Seq(
  "com.twitter" %% "finatra-http" % versions.finatra withSources() withJavadoc(),

it will download the source and docs. Then when I click Attach Sources... if I point to that in my cache, Intellij will finally update and load the sources correctly.

See http://www.scala-sbt.org/0.13/docs/Library-Management.html#Download+Sources for more details.