NPE when deploying to remote repo

Deploying to a remote repo results in a NullPointerException

C:\Temp>mvn org.apache.maven.dotnet.plugins:maven-deploy-plugin:deploy-file -Dfile=sample.dll -DgroupId=Examples -DartifactId=SampleProject -DartifactVersion=1.0 -Dpackaging=library -Durl=file:///temp/repo
...
[INFO] [deploy:deploy-file]
Uploading: file:///temp/repo/Examples/SampleProject/1.0/SampleProject-1.0.dll
3K uploaded
[INFO] ------------------------------------------------------------------------
[ERROR] FATAL ERROR
[INFO] ------------------------------------------------------------------------
[INFO] null
[INFO] ------------------------------------------------------------------------
[INFO] Trace
java.lang.NullPointerException
at hidden.org.codehaus.plexus.util.FileUtils.copyFile(FileUtils.java:919)
at org.apache.maven.project.artifact.ProjectArtifactMetadata.storeInLocalRepository(ProjectArtifactMetadata.java:86)
at org.apache.maven.artifact.repository.metadata.DefaultRepositoryMetadataManager.deploy(DefaultRepositoryMetadataManager.java:437)
at org.apache.maven.artifact.deployer.DefaultArtifactDeployer.deploy(DefaultArtifactDeployer.java:86)
at org.apache.maven.dotnet.plugins.DeployFileMojo.execute(DeployFileMojo.java:150)
at org.apache.maven.plugin.DefaultPluginManager.executeMojo(DefaultPluginManager.java:451)
at org.apache.maven.lifecycle.DefaultLifecycleExecutor.executeGoals(DefaultLifecycleExecutor.java:558)
at org.apache.maven.lifecycle.DefaultLifecycleExecutor.executeStandaloneGoal(DefaultLifecycleExecutor.java:512)
at org.apache.maven.lifecycle.DefaultLifecycleExecutor.executeGoal(DefaultLifecycleExecutor.java:482)
at org.apache.maven.lifecycle.DefaultLifecycleExecutor.executeGoalAndHandleFailures(DefaultLifecycleExecutor.java:330)
at org.apache.maven.lifecycle.DefaultLifecycleExecutor.executeTaskSegments(DefaultLifecycleExecutor.java:227)
at org.apache.maven.lifecycle.DefaultLifecycleExecutor.execute(DefaultLifecycleExecutor.java:142)
at org.apache.maven.DefaultMaven.doExecute(DefaultMaven.java:336)
at org.apache.maven.DefaultMaven.execute(DefaultMaven.java:129)
at org.apache.maven.cli.MavenCli.main(MavenCli.java:287)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
at java.lang.reflect.Method.invoke(Method.java:585)
at org.codehaus.classworlds.Launcher.launchEnhanced(Launcher.java:315)
at org.codehaus.classworlds.Launcher.launch(Launcher.java:255)
at org.codehaus.classworlds.Launcher.mainWithExitCode(Launcher.java:430)

at org.codehaus.classworlds.Launcher.main(Launcher.java:375)
[INFO] ------------------------------------------------------------------------
[INFO] Total time: 8 seconds
[INFO] Finished at: Tue May 27 16:05:57 MST 2008
[INFO] Final Memory: 6M/14M
[INFO] ------------------------------------------------------------------------

The file is deployed, but without metadata:

C:\Temp>tree /F repo
Folder PATH listing
Volume serial number is BCCB-CB88
C:\TEMP\REPO
└───Examples
└───SampleProject
└───1.0
SampleProject-1.0.dll
SampleProject-1.0.dll.md5
SampleProject-1.0.dll.sha1