- With OUT_IPA / -o empty, the IPA is written to the NSP folder
(<the profile's ipa>, e.g. FEEngage.ipa), next to the NSPs and
<id>_build/, instead of ~/Desktop.
- The script prints the output IPA and its work folder at the start;
the extracted game files are in <id>_build/extract/ in the NSP
folder (deleted after the IPA is built unless --keep-extracted).
- README and the script header say so. Checked with a run on the
Engage NSP folder (default and -o) up to the free-space check.