}
	mustSelectFor := map[module.Version][]module.Version{}

	mms := modload.MainModules

	opts := modload.PackageOpts{
		Tags:                     imports.AnyTags(),
		VendorModulesInGOROOTSrc: true,
		ResolveMissingImports:    false,
		LoadTests:                true,
		AllowErrors:              true,
		SilencePackageErrors:     true,
		SilenceUnmatchedWarnings: true,
	}
	for _, m := range mms.Versions() {
		opts.MainModule = m

	VendorModulesInGOROOTSrc bool

	// ResolveMissingImports indicates that we should attempt to add module
	// dependencies as needed to resolve imports of packages that are not found.
	//
	// For commands that support the -mod flag, resolving imports may still fail
	// if the flag is set to "readonly" (the default) or "vendor".
	ResolveMissingImports bool

		Tags:                     imports.AnyTags(),
		Tidy:                     true,
		TidyDiff:                 tidyDiff,
		TidyCompatibleVersion:    tidyCompat.String(),
		VendorModulesInGOROOTSrc: true,
		ResolveMissingImports:    true,
		LoadTests:                true,
		AllowErrors:              tidyE,
		SilenceMissingStdImports: true,
		Switcher:                 new(toolchain.Switcher),
	}, "all")

	}
	modload.ForceUseModules = true
	modload.RootMode = modload.NeedRoot

	loadOpts := modload.PackageOpts{
		Tags:                     imports.AnyTags(),
		VendorModulesInGOROOTSrc: true,
		ResolveMissingImports:    true,
		UseVendorAll:             true,
		AllowErrors:              vendorE,
		SilenceMissingStdImports: true,
	}
	_, pkgs := modload.LoadPackages(ctx, loadOpts, "all")

	var vdir string
	switch {

		// -mod=readonly, which in turn implies no new requirements. The code path
		// that would result in add being non-empty returns an error before it
		// reaches this point: The set of modules to add comes from
		// resolveMissingImports, which in turn resolves each package by calling
		// queryImport. But queryImport explicitly checks for -mod=readonly, and
		// return an error.
		panic("add is not empty")
	}

		// exit, since we need to load retractions later.
		pkgOpts := modload.PackageOpts{
			VendorModulesInGOROOTSrc: true,
			LoadTests:                *getT,
			ResolveMissingImports:    false,
			AllowErrors:              true,
			SilenceNoGoErrors:        true,
		}
		matches, pkgs := modload.LoadPackages(ctx, pkgOpts, pkgPatterns...)
		for _, m := range matches {

				setPGOProfilePath(pkgs)
				return pkgs
			}
		}
	}

	var matches []*search.Match
	if modload.Init(); cfg.ModulesEnabled {
		modOpts := modload.PackageOpts{
			ResolveMissingImports: true,
			LoadTests:             opts.ModResolveTests,
			SilencePackageErrors:  true,
		}
		matches, _ = modload.LoadPackages(ctx, modOpts, patterns...)
	} else {
		noModRoots := []string{}