I have no good answer for you (I think I have seen someone doing this, and they will chime in, I’m sure),
But I had a look, and even the NPM library currently requires an extra step to manually download the binary, if I understand the setup.
If we have some Netlify people in here (I will try to find them if they don’t respond); This binary is now out of beta and it would be great if you (and Cloudflare and friends) installed this as part of your build image – and allowed people to select a version via a DARTSASS_VERSION or something.
For reference: