> update
[failure]
> clean-lib
[success]
$ copy-file changes/ivysettings.xml sub/ivysettings.xml
[success]

> update
[success]
> clean-lib
[success]

$ delete sub/ivysettings.xml
[success]
> update
[failure]
> clean-lib
[success]

$ copy-file changes/ivysettings.xml ivysettings.xml
[success]
> update
[success]