found a strange situation was just showing @cedric:
project builds inside IJ15 and even runs Spek tests
but then Kobalt crashes with this error:
exception: java.lang.NoSuchMethodError: kotlin.IntProgression.getStep()I
at kotlin.RangesKt___RangesKt.reversed(_Ranges.kt:726)
at kotlin.RangesKt.reversed(Unknown Source)
does not appear to be a version of kontlinc in the path.