[error] javadoc: error - Illegal package name: "2.3-SNAPSHOT"

I get this when running ./build and then "publish-local" to build the framework on Ubuntu 12.04

    [info] Generating /usr/local/users/bmccann/playframework/framework/src/play-docs/target/apidocs/java/constant-values.html...
    [info] Generating /usr/local/users/bmccann/playframework/framework/src/play-docs/target/apidocs/java/serialized-form.html...
    [info] Building index for all the packages and classes...
    [info] Generating /usr/local/users/bmccann/playframework/framework/src/play-docs/target/apidocs/java/overview-tree.html...
    [info] Generating /usr/local/users/bmccann/playframework/framework/src/play-docs/target/apidocs/java/index-all.html...
    [info] Generating /usr/local/users/bmccann/playframework/framework/src/play-docs/target/apidocs/java/deprecated-list.html...
    [info] Building index for all classes...
    [info] Generating /usr/local/users/bmccann/playframework/framework/src/play-docs/target/apidocs/java/allclasses-frame.html...
    [info] Generating /usr/local/users/bmccann/playframework/framework/src/play-docs/target/apidocs/java/allclasses-noframe.html...
    [info] Generating /usr/local/users/bmccann/playframework/framework/src/play-docs/target/apidocs/java/index.html...
    [info] Generating /usr/local/users/bmccann/playframework/framework/src/play-docs/target/apidocs/java/overview-summary.html...
    [info] Generating /usr/local/users/bmccann/playframework/framework/src/play-docs/target/apidocs/java/help-doc.html...
    [info] 17 warnings
    [info] Play 2.3-SNAPSHOT Java API documentation successful.
    [error] javadoc: error - Illegal package name: "2.3-SNAPSHOT"
    [info] 1 error
    [info] Packaging /usr/local/users/bmccann/playframework/framework/src/play-docs/target/scala-2.10/play-docs_2.10-2.3-SNAPSHOT.jar ...
    [info] Done packaging.
    [info] 	published play-docs_2.10 to /usr/local/users/bmccann/playframework/repository/local/com.typesafe.play/play-docs_2.10/2.3-SNAPSHOT/poms/play-docs_2.10.pom
    [info] 	published play-docs_2.10 to /usr/local/users/bmccann/playframework/repository/local/com.typesafe.play/play-docs_2.10/2.3-SNAPSHOT/jars/play-docs_2.10.jar
    [info] 	published play-docs_2.10 to /usr/local/users/bmccann/playframework/repository/local/com.typesafe.play/play-docs_2.10/2.3-SNAPSHOT/srcs/play-docs_2.10-sources.jar
    [info] 	published play-docs_2.10 to /usr/local/users/bmccann/playframework/repository/local/com.typesafe.play/play-docs_2.10/2.3-SNAPSHOT/srcs/play-docs_2.10-tests-sources.jar
    [info] 	published ivy to /usr/local/users/bmccann/playframework/repository/local/com.typesafe.play/play-docs_2.10/2.3-SNAPSHOT/ivys/ivy.xml
    [success] Total time: 141 s, completed Nov 14, 2013 1:18:40 PM
    >