{Name: "GOPROXY", Value: cfg.GOPROXY, Changed: cfg.GOPROXYChanged},
		{Name: "GOROOT", Value: cfg.GOROOT},
		{Name: "GOSUMDB", Value: cfg.GOSUMDB, Changed: cfg.GOSUMDBChanged},
		{Name: "GOTMPDIR", Value: cfg.Getenv("GOTMPDIR")},
		{Name: "GOTOOLCHAIN"},
		{Name: "GOTOOLDIR", Value: build.ToolDir},
		{Name: "GOVCS", Value: cfg.GOVCS},
		{Name: "GOVERSION", Value: runtime.Version()},

	}
	return names
}

// xworkdir creates a new temporary directory to hold object files
// and returns the name of that directory.
func xworkdir() string {
	name, err := os.MkdirTemp(os.Getenv("GOTMPDIR"), "go-tool-dist-")
	if err != nil {
		fatalf("%v", err)
	}
	return name
}

// fatalf prints an error message to standard error and exits.
func fatalf(format string, args ...interface{}) {

		b.WorkDir = workDir
	} else if cfg.BuildN {
		b.WorkDir = "$WORK"
	} else {
		if !buildInitStarted {
			panic("internal error: NewBuilder called before BuildInit")
		}
		tmp, err := os.MkdirTemp(cfg.Getenv("GOTMPDIR"), "go-build")
		if err != nil {
			base.Fatalf("go: creating work dir: %v", err)
		}
		if !filepath.IsAbs(tmp) {
			abs, err := filepath.Abs(tmp)
			if err != nil {
				os.RemoveAll(tmp)

		The name of checksum database to use and optionally its public key and
		URL. See https://golang.org/ref/mod#authenticating.
	GOTOOLCHAIN
		Controls which Go toolchain is used. See https://go.dev/doc/toolchain.
	GOTMPDIR
		The directory where the go command will write
		temporary source files, packages, and binaries.
	GOVCS
		Lists version control commands that may be used with matching servers.
		See 'go help vcs'.
	GOWORK