Consider installing pkgsrc

[rdmark]

The pkgsrc framework distributed by SmartOS adds numerous modern packages to OmniOS. In fact, it is mandatory to build my project (Meson etc.) so I'm installing it for every CI run with your OmniOS vmactions, adding minutes to the runtime.

You might want to consider pre-installing it on your image:

https://pkgsrc.smartos.org/install-on-illumos/

[Neilpang]

you can install any tools in this script:
https://github.com/vmactions/omnios-builder/blob/main/hooks/postBuild.sh

It will be run after the vm is built, to initialize the VM.