diff --git a/src/main/kotlin/com/beust/kobalt/internal/DynamicGraph.kt b/src/main/kotlin/com/beust/kobalt/internal/DynamicGraph.kt
index 055a2d08..a0d22bdb 100644
--- a/src/main/kotlin/com/beust/kobalt/internal/DynamicGraph.kt
+++ b/src/main/kotlin/com/beust/kobalt/internal/DynamicGraph.kt
@@ -10,7 +10,7 @@ import com.google.common.collect.HashMultimap
 import java.lang.reflect.InvocationTargetException
 import java.util.concurrent.*
 
-open class TaskResult2<T>(success: Boolean, val value: T) : TaskResult(success) {
+open class TaskResult2<T>(success: Boolean, errorMessage: String?, val value: T) : TaskResult(success, errorMessage) {
     override fun toString() = toString("TaskResult", "value", value, "success", success)
 }
 
diff --git a/src/main/kotlin/com/beust/kobalt/internal/TaskManager.kt b/src/main/kotlin/com/beust/kobalt/internal/TaskManager.kt
index 9b7a633c..8f0806ae 100644
--- a/src/main/kotlin/com/beust/kobalt/internal/TaskManager.kt
+++ b/src/main/kotlin/com/beust/kobalt/internal/TaskManager.kt
@@ -281,7 +281,7 @@ public class TaskManager @Inject constructor(val args: Args) {
                 object : BasePluginTask(plugin, name, description, project) {
                     override fun call(): TaskResult2<PluginTask> {
                         val taskResult = task(project)
-                        return TaskResult2(taskResult.success, this)
+                        return TaskResult2(taskResult.success, taskResult.errorMessage, this)
                     }
                 })
         runBefore.forEach { runBefore(it, name) }
@@ -307,11 +307,13 @@ class TaskWorker(val tasks: List<PluginTask>, val dryRun: Boolean) : IWorker<Plu
             }
         }
         var success = true
+        val errorMessages = arrayListOf<String>()
         tasks.forEach {
             val tr = if (dryRun) TaskResult() else it.call()
             success = success and tr.success
+            if (tr.errorMessage != null) errorMessages.add(tr.errorMessage)
         }
-        return TaskResult2(success, tasks[0])
+        return TaskResult2(success, errorMessages.joinToString("\n"), tasks[0])
     }
 
 //    override val timeOut : Long = 10000
diff --git a/src/test/kotlin/com/beust/kobalt/internal/DynamicGraphTest.kt b/src/test/kotlin/com/beust/kobalt/internal/DynamicGraphTest.kt
index 70a6772e..f0361288 100644
--- a/src/test/kotlin/com/beust/kobalt/internal/DynamicGraphTest.kt
+++ b/src/test/kotlin/com/beust/kobalt/internal/DynamicGraphTest.kt
@@ -31,7 +31,7 @@ public class DynamicGraphTest {
         override fun call() : TaskResult2<T> {
             log(2, "Running node $n")
             runNodes.add(n)
-            return TaskResult2(errorFunction(n), n)
+            return TaskResult2(errorFunction(n), null, n)
         }
     }