Unable to build sikulix locally

I've been trying to build Sikuli locally and am running into problems. I've installed the latest Maven 3.3.3 and checked out the code from Github. I'm then trying to follow instructions here:

https://github.com/RaiMan/SikuliX-2014/wiki/How-to-produce-the-ready_to_use-jar-packages

So I do:
1) mvn clean install (works without errors)
2) mvn -pl Setup exec:exec and press Cancel when the dialog comes up

I then see what there is according to the above link. The first two are present and correct but there is no folder
[SikulixAppData]/SikulixDownloads-timestamp at all.

If I anyway proceed and copy the [SikulixAppData]/SikulixSetup/sikulixsetup-timestamp.jar somewhere and run it as normal, it downloads the API setup and IDE setup jars from your nightjob location and doesn't include my local code changes. It does seem as though I have e.g. a file sikulixsetupAPI-1.1.0-forsetup.jar, in the build tree under SetupAPI/target, but I don't think that one is being used.

What could be going wrong here?