dirs = append(dirs, dir)
					roots = append(roots, modRoot)
				}
			}
		}

		if HasModRoot() {
			vendorDir := VendorDir()
			dir, inVendorDir, _ := dirInModule(path, "", vendorDir, false)
			if inVendorDir {
				readVendorList(vendorDir)
				// If vendorPkgModule does not contain an entry for path then it's probably either because

	var vdir string
	switch {
	case filepath.IsAbs(vendorO):
		vdir = vendorO
	case vendorO != "":
		vdir = filepath.Join(base.Cwd(), vendorO)
	default:
		vdir = filepath.Join(modload.VendorDir())
	}
	if err := os.RemoveAll(vdir); err != nil {
		base.Fatal(err)
	}

	modpkgs := make(map[module.Version][]string)
	for _, pkg := range pkgs {
		m := modload.PackageModule(pkg)

	}
	if gover.IsToolchain(m.Path) {
		return rawGoModSummary(m)
	}

	if cfg.BuildMod == "vendor" {
		summary := &modFileSummary{
			module: module.Version{Path: m.Path},
		}

		readVendorList(VendorDir())
		if vendorVersion[m.Path] != m.Version {
			// This module is not vendored, so packages cannot be loaded from it and
			// it cannot be relevant to the build.
			return summary, nil
		}