Better error message when build folder does not contain Build class

1 files changed, 2 insertions, 0 deletions

diff --git a/stage2/BuildBuild.scala b/stage2/BuildBuild.scala
index 45d86f8..813b44b 100644
--- a/stage2/BuildBuild.scala
+++ b/stage2/BuildBuild.scala
@@ -17,6 +17,8 @@ class BuildBuild(context: Context) extends Build(context){
       .newInstance(managedContext)
       .asInstanceOf[Build]
   } catch {
+    case e: ClassNotFoundException if e.getMessage == lib.buildClassName => 
+      throw new Exception("You need to remove the directory or define a class Build in: "+context.cwd)
     case e: Exception =>
       throw new Exception("during build: "+context.cwd, e)
   }