I've a matrix job that uses the "Copy To Slave" plugin to "Copy files back to master node" as a post-build action. I then use the PostBuildScript plugin to run on the master node and process these files.

However, even though Copy-to-Slave succeeds, the files aren't in the master workspace. Looking at the build output on the slaves shows:

[copy-to-slave] Copying 'build/**/*', excluding nothing, from 'file:/home/foobar/jenkins/workspace/MyJob/label/foobar-ci-linux/' on 'hudson.slaves.DumbSlave@564c7adb' to 'file:/Users/foobar/.jenkins/jobs/MyJob/configurations/axis-label/foobar-ci-linux/workspace/' on the master.

The path

/Users/foobar/.jenkins/jobs/MyJob/configurations/axis-label/foobar-ci-linux/workspace/

is not the workspace. The workspace is actually here:

/Users/foobar/.jenkins/.jenkins/workspace/MyJob/

Why does Copy-To-Slave copy the files to this weird path?