gatling-it:testOnly can't find simulations in set scalaSource for gatling-sbt plugin

I currently want my larger simulations in
src/main/scala instead of
src/it/scala

Reading the documentation at http://gatling.io/docs/2.1.6/extensions/sbt_plugin.html I have these two scenarios

Gatling
with basic.BasicExampleSimulationSucceeds in src/main/scala
changing the scalaSource in buildsbt

scalaSource in Gatling := baseDirectory.value / “src/main/scala”

gatling:testOnly basic.BasicExampleSimulationSucceeds

finds and runs the simulation

GatlingIt
with basic.BasicExampleSimulationSucceeds in src/main/scala
changing the scalaSource in build.sbt
scalaSource in GatlingIt := baseDirectory.value / “src/main/scala”

gatling-it:testOnly basic.BasicExampleSimulationSucceeds

cannot find the simulation

in both cases
gatling:scalaSource and gatling-it:scalaSource are set correctly
I’ve tried this with gatling-sbt 2.1.7 and 2.1.5

Gentle ping Pierre Dal-Pra?