sbt run task missing provided libraries

I add a provided library to my project, such as spark.

"org.apache.spark" %% "spark-streaming" % sparkVersion % "provided",

It works fine when I make the project.

But when I run some scala program depends on spark-streaming lib, it gives me following error message:

Exception in thread "main" java.lang.NoClassDefFoundError: org/apache/spark/streaming/StreamingContext
    at java.lang.Class.getDeclaredMethods0(Native Method)
    at java.lang.Class.privateGetDeclaredMethods(Class.java:2444)
    at java.lang.Class.getMethod0(Class.java:2687)
    at java.lang.Class.getMethod(Class.java:1620)
    at com.intellij.rt.execution.application.AppMain.main(AppMain.java:125)
Caused by: java.lang.ClassNotFoundException: org.apache.spark.streaming.StreamingContext
    at java.net.URLClassLoader$1.run(URLClassLoader.java:217)
    at java.security.AccessController.doPrivileged(Native Method)
    at java.net.URLClassLoader.findClass(URLClassLoader.java:205)
    at java.lang.ClassLoader.loadClass(ClassLoader.java:321)
    at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:294)
    at java.lang.ClassLoader.loadClass(ClassLoader.java:266)
    ... 5 more

I tried to change this dependency to

"org.apache.spark" %% "spark-streaming" % sparkVersion,

It works.

It seems that sbt plugin does not support provided libbrary in Run task ?

My env:

IDEA 14 community edition with Scala plugin.

Thanks!