From the maintainer Li Haoyi: I'm putting a 500USD bounty on this issue, payable by bank transfer on a merged PR implementing this.

Ever since 126f574, the various Windows CI jobs seem to be finishing in ~1min, rather than the 10-30min they used to. Something's probably wrong and they're not actually testing anything. We should figure out what, fix it, and ensure Windows CI is able to pass on the current latest version of Mill built from HEAD