On the derive side, there's the usual proc-macro2/quote/syn trio, but those come up frequently in derive crates due to what they do, and other than that, th

On the derive side, there's the usual proc-macro2/quote/syn trio, but those come up frequently in derive crates due to what they do, and other than that, there's just `heck`, which is again an obvious dependency in context. They're common dependencies, sure, but not necessarily the same versions. So, yeah, it's entirely possible you'll end up building multiple versions of quote/syn.