platform:conda:macos-arm64 fail to run executables

LALSuite platform:conda:macos-arm64 jobs are failing, e.g. https://git.ligo.org/lscsoft/lalsuite/-/jobs/1818475

It initially looked like these were failures with help2man:

 GEN      lal_version.man
help2man: can't get `--help' info from ./lal_version

I hacked the CI to run the executable directly, which yielded:

echo XXX; ./lal_simd_detect --help; echo XXX
XXX
/bin/sh: line 1: 82176 Killed: 9               ./lal_simd_detect --help
XXX

So it looks like executables are being killed for some reason. Out of memory?? I don't know how that container is set up.