There seems to be some problem with hatari filename mangling:
The same directory, on the host:
~/atari/freemint.org/a $ ls -l
total 8
drwxr-xr-x 2 sebilla users 4096 16. Mai 12:31 libcmini
drwxr-xr-x 2 sebilla users 4096 16. Mai 12:31 libcmini-examples
That is, the 2nd (too long) directory name is simply truncated, and there is no way to access it in the desktop.