arg := args[0]
		var pkgs []*load.Package
		if strings.Contains(arg, "@") && !build.IsLocalImport(arg) && !filepath.IsAbs(arg) {
			var err error
			pkgs, err = load.PackagesAndErrorsOutsideModule(ctx, pkgOpts, args[:1])
			if err != nil {
				base.Fatal(err)
			}
		} else {
			pkgs = load.PackagesAndErrors(ctx, pkgOpts, args[:1])
		}

		if len(pkgs) == 0 {

	// Set up modules without an explicit go.mod, to download go.mod.
	modload.ForceUseModules = true
	modload.RootMode = modload.NoRoot
	modload.Init()
	defer modload.Reset()

	// See internal/load.PackagesAndErrorsOutsideModule
	ctx := context.Background()
	allowed := modload.CheckAllowed
	if modload.IsRevisionQuery(path, version) {
		// Don't check for retractions if a specific revision is requested.
		allowed = nil
	}

	// TODO(golang.org/issue/40276): don't report errors loading non-main packages
	// matched by a pattern.
	pkgOpts := load.PackageOpts{MainOnly: true}
	pkgs, err := load.PackagesAndErrorsOutsideModule(ctx, pkgOpts, args)
	if err != nil {
		base.Fatal(err)
	}
	load.CheckPackageErrors(pkgs)
	patterns := make([]string, len(args))
	for i, arg := range args {

		pkg.Error = &PackageError{Err: &mainPackageError{importPath: pkg.ImportPath}}
		pkg.Incomplete = true
	}
	setToolFlags(pkg)

	return pkg
}

// PackagesAndErrorsOutsideModule is like PackagesAndErrors but runs in
// module-aware mode and ignores the go.mod file in the current directory or any
// parent directory, if there is one. This is used in the implementation of 'go