It looks like the same support for all file systems was removed from libparted. According to the release notes:<p><pre><code> Changes in behavior
Remove all FS-related (file system-related) sub-commands; these commands
are no longer recognized because they were all dependent on parted "knowing"
too much about file system: mkpartfs, mkfs, cp, move, check, resize.
This change removes not just the user interface bits, but also the
library functions and nearly all of the underlying FS-munging code.
The code embedded in Parted by which it knew about those file systems
was so old, unmaintainable and buggy that while seemingly drastic,
this change is like removing a gangrenous toe.</code></pre>