How do I apply a patch like this with buildGoModule? It patches go.{mod,sum}, so it would need to happen before fetching the Go modules. A primitive try like this didn't work:

(_final: prev: {
              grafana-alloy = prev.grafana-alloy.overrideAttrs (oldAttrs: {
                patches = oldAttrs.patches or [ ] ++ [
                  (prev.fetchpatch {
                    url = "https://github.com/xingzihai/alloy/commit/7fa0cbce40c5d09cec5f6b45a10de823ec0c9732.patch";
                    hash = "sha256-uyGhNiIE09tkMekJ+Wm+CBfT0q2RmEPRAwOk/BaZQSk=";
                  })
                ];
                vendorHash = "...";
              });
            })

^ Solution was to do:

patchPhase = ''
                    patch -p1 < ${m1cpuPatch}
                  ''

Not sure if this is due to grafana-alloy having a custom patchPhase.