Can pulumi make use of node projects with “modern” (v2+) yarn?

yeah, the best I could achieve with pulumi so far was the use of

pnpm

over

yarn v1

Yeah, Yarn PnP is definitely not supported. You might be able to use Yarn Berry (v2+) without PnP. And, technically, PNPM isn't supported either. It seems to work for a lot of people, but we don't officially support it yet, so it may break without notice. However, my current project has recently been to lay the groundwork to add official support for pkg managers beyond NPM and Yarn Classic -- namely, PNPM, Yarn Berry, and NX. Just yesterday I opened a draft PR to use dynamic dispatch for pkg manager invocation instead of special-casing the differences between NPM and Yarn. I expect we'll add PNPM support before the end of the quarter, but I can't make any promises. 🙂

I use Yarn2 without PnP, without any problems.