cmd/go/internal/vgo: fix verify paths

Change-Id: Ide120ac48bd3dca81b6d19665e7f75f154a0b67d
Reviewed-on: https://go-review.googlesource.com/95698
Run-TryBot: Russ Cox <rsc@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Andrew Bonventre <andybons@golang.org>
diff --git a/vendor/cmd/go/internal/vgo/verify.go b/vendor/cmd/go/internal/vgo/verify.go
index 2c07018..cb9dc7b 100644
--- a/vendor/cmd/go/internal/vgo/verify.go
+++ b/vendor/cmd/go/internal/vgo/verify.go
@@ -56,7 +56,7 @@
 
 func verifyMod(mod module.Version) bool {
 	ok := true
-	zip := filepath.Join(srcV, "cache", mod.Path+"@"+mod.Version, "zip")
+	zip := filepath.Join(srcV, "cache", mod.Path, "/@v/", mod.Version+".zip")
 	_, zipErr := os.Stat(zip)
 	dir := filepath.Join(srcV, mod.Path+"@"+mod.Version)
 	_, dirErr := os.Stat(dir)