Can't use sbt 0.13.7 with Play subprojects

Question

I have a sample Play 2.3.8 project that is composed by two subprojects (common and common2):

$ tree -L 2 .
.
├── build.sbt
├── common
│   ├── app
│   ├── bui         


        

Answer 1

Indeed it seems that something changed between sbt 0.13.5 and 0.13.6. In my sample project I have all the subprojects defined in the main build.sbt, but had also them redefined inside the subprojects folder.

So in common/build.sbt for example, the subproject is defined again as

lazy val main = (project in file(".")).enablePlugins(PlayJava)

This works well in 0.13.5, but breaks after that.

So the solution was to remove those lines and only define the subprojects in the main build.sbt.