Doesn't trigger workflow

[olespagnon-vdm]

I'm trying to trigger a workflow I'm working on. I've installed this plugin as I need to be able to run gh commands in it.
However when I type the command :
gh act pull_request -W .github/workflows/build-push.yml
it outputs :
INFO[0000] Using docker host 'unix:///var/run/docker.sock', and daemon socket 'unix:///var/run/docker.sock'
but does nothing else.
But when running act command it does work until gh command is not found.
Am I missing something ?
I have tried to specifiy a github pull request event json but still nothing.