gettext is known as cause of problem for running host tool in target ABI
in our builds, and the latest script still had the issue.
https://github.com/atsushieno/aap-lv2-fluidsynth/actions/runs/914453645
This fixes the problem by explicitly specifying that the build host is
x86_64 linux.
If you want to reuse the script on other platforms, you have to edit it.