diff --git a/src/main/kotlin/com/beust/kobalt/Main.kt b/src/main/kotlin/com/beust/kobalt/Main.kt
index 3685a506..b0710cc6 100644
--- a/src/main/kotlin/com/beust/kobalt/Main.kt
+++ b/src/main/kotlin/com/beust/kobalt/Main.kt
@@ -120,6 +120,7 @@ private class Main @Inject constructor(
                 try {
                     allProjects = buildFileCompilerFactory.create(listOf(buildFile)).compileBuildFiles(args)
                 } catch(ex: Throwable) {
+                    log(2, "Couldn't parse preBuildScript.jar: ${ex.message}")
                     if (! File(".kobalt").deleteRecursively()) {
                         warn("Couldn't delete .kobalt, please delete it manually")
                     } else {