You can customize the target element, which defines the ZFS build dataset where the image will be created. You must provide a valid dataset location. Check the default build area to make sure that the build will not destroy content that you need to keep on your system. The path to the dataset is relative to the pool name defined. In the example below, the dataset would be installed as rpool/dc/sample-dataset-location.
The following example shows a sample target element.
<target> <logical> <zpool action="use_existing" name="rpool"> <dataset> <filesystem name="dc/sample-dataset-location" action="preserve"/> </dataset> </zpool> </logical> </target>