Targets fail

(I assume there is a project called xbuild_project and the shell is in it and the target is called "target.json")
```sh
cd ..
mv xbuild_project xbuild_project_2
cd xbuild_project_2
# Fails
cargo xbuild --target target.json
cp target.json target2.json
# OK
cargo xbuild --target target2.json
```

After renaming the target ID seems to be different