How to include *.class file with package in CLASSPATH?

Assume I have an already compiled java class in the following location:

D:\java\output\aaa\bbb\ccc\myclass.class

myclass.java contains the following package information:

package aaa.bbb.ccc;

The current path in the command prompt is

D:\java>

I want to compile another java class test.java which uses the class
myclass e.g. in a statement like

myclass dummy = new myclass();

But when I enter a statement like:

javac -cp D:\java\output\aaa\bbb\ccc;%CLASSPATH% test.java

then the compiler complains that he cannot find myclass:

test.java:22: cannot access myclass
bad class file: D:\java\output\aaa\bbb\ccc\myclass.class
class file contains wrong class: aaa.bbb.ccc.myclass
Please remove or make sure it appears in the correct subdirectory of the
classpath.
          myclass dummy = new myclass();
          ^
1 error

Why?

I added D:\java\output\aaa\bbb\ccc to the CLASSPATH. Shouldn't that be
sufficient?

Ulf