AIX release builds broken

Starting 21 June release AIX builds have been failing.

e.g.

07:18:59 if [ ! -r node ] || [ ! -L node ]; then \
07:18:59   ln -fs out/Release/node node; fi
07:18:59 gmake: *** [Makefile:1417: node-v27.0.0-nightly20260621665daeb54c-aix-ppc64.tar] Error 2
07:18:59 Build step 'Conditional steps (multiple)' marked build as failure
07:18:59 Archiving artifacts

There's not a lot to go on here, but for a passing build the output would be

07:23:12 if [ ! -r node ] || [ ! -L node ]; then \
07:23:12   ln -fs out/Release/node node; fi
07:23:12 /opt/freeware/bin/python3 tools/install.py install --dest-dir 'node-v27.0.0-nightly20260620a17d2b8fe3-aix-ppc64' --prefix '/'
07:23:12 installing /home/iojs/build/ws/node-v27.0.0-nightly20260620a17d2b8fe3-aix-ppc64/bin/node
07:23:12 installing /home/iojs/build/ws/node-v27.0.0-nightly20260620a17d2b8fe3-aix-ppc64/share/doc/node/gdbinit
07:23:12 installing /home/iojs/build/ws/node-v27.0.0-nightly20260620a17d2b8fe3-aix-ppc64/share/doc/node/lldb_commands.py
07:23:12 installing /home/iojs/build/ws/node-v27.0.0-nightly20260620a17d2b8fe3-aix-ppc64/share/man/man1/node.1
...

Builds on the test CI are generally passing, which would point to a part of the build that is only run for the release tar balls (during or just before running tools/install.py).

Opening this here instead of the Build WG repository as no changes have been made to AIX release machine in the time period when the builds started to fail.

Start with the failing Makefile target at Makefile:1417 and tools/install.py, comparing the failing 21 June AIX release output with the passing example. Trace the release-tarball step before tools/install.py; done means the AIX release build completes and produces the tarball.