diff --git a/ui/build/config.go b/ui/build/config.go
index bd3ad0c2b..e9a8fc910 100644
--- a/ui/build/config.go
+++ b/ui/build/config.go
@@ -15,6 +15,7 @@
 package build
 
 import (
+	"fmt"
 	"os"
 	"path/filepath"
 	"runtime"
@@ -261,7 +262,7 @@ func NewConfig(ctx Context, args ...string) Config {
 	ret.environ.Set("BUILD_DATETIME_FILE", buildDateTimeFile)
 
 	if ret.UseRBE() {
-		for k, v := range getRBEVars(ctx, tmpDir) {
+		for k, v := range getRBEVars(ctx, Config{ret}) {
 			ret.environ.Set(k, v)
 		}
 	}
@@ -825,13 +826,73 @@ func (c *configImpl) StartRBE() bool {
 	return true
 }
 
-func (c *configImpl) RBEStatsOutputDir() string {
+func (c *configImpl) logDir() string {
+	if c.Dist() {
+		return filepath.Join(c.DistDir(), "logs")
+	}
+	return c.OutDir()
+}
+
+func (c *configImpl) rbeStatsOutputDir() string {
 	for _, f := range []string{"RBE_output_dir", "FLAG_output_dir"} {
 		if v, ok := c.environ.Get(f); ok {
 			return v
 		}
 	}
-	return ""
+	return c.logDir()
+}
+
+func (c *configImpl) rbeLogPath() string {
+	for _, f := range []string{"RBE_log_path", "FLAG_log_path"} {
+		if v, ok := c.environ.Get(f); ok {
+			return v
+		}
+	}
+	return fmt.Sprintf("text://%v/reproxy_log.txt", c.logDir())
+}
+
+func (c *configImpl) rbeExecRoot() string {
+	for _, f := range []string{"RBE_exec_root", "FLAG_exec_root"} {
+		if v, ok := c.environ.Get(f); ok {
+			return v
+		}
+	}
+	wd, err := os.Getwd()
+	if err != nil {
+		return ""
+	}
+	return wd
+}
+
+func (c *configImpl) rbeDir() string {
+	if v, ok := c.environ.Get("RBE_DIR"); ok {
+		return v
+	}
+	return "prebuilts/remoteexecution-client/live/"
+}
+
+func (c *configImpl) rbeReproxy() string {
+	for _, f := range []string{"RBE_re_proxy", "FLAG_re_proxy"} {
+		if v, ok := c.environ.Get(f); ok {
+			return v
+		}
+	}
+	return filepath.Join(c.rbeDir(), "reproxy")
+}
+
+func (c *configImpl) rbeAuth() (string, string) {
+	credFlags := []string{"use_application_default_credentials", "use_gce_credentials", "credential_file"}
+	for _, cf := range credFlags {
+		for _, f := range []string{"RBE_" + cf, "FLAG_" + cf} {
+			if v, ok := c.environ.Get(f); ok {
+				v = strings.TrimSpace(v)
+				if v != "" && v != "false" && v != "0" {
+					return "RBE_" + cf, v
+				}
+			}
+		}
+	}
+	return "RBE_use_application_default_credentials", "true"
 }
 
 func (c *configImpl) UseRemoteBuild() bool {
diff --git a/ui/build/rbe.go b/ui/build/rbe.go
index fd3b7abb5..99107e3d9 100644
--- a/ui/build/rbe.go
+++ b/ui/build/rbe.go
@@ -37,10 +37,8 @@ const (
 
 func rbeCommand(ctx Context, config Config, rbeCmd string) string {
 	var cmdPath string
-	if rbeDir, ok := config.Environment().Get("RBE_DIR"); ok {
+	if rbeDir := config.rbeDir(); rbeDir != "" {
 		cmdPath = filepath.Join(rbeDir, rbeCmd)
-	} else if home, ok := config.Environment().Get("HOME"); ok {
-		cmdPath = filepath.Join(home, "rbe", rbeCmd)
 	} else {
 		ctx.Fatalf("rbe command path not found")
 	}
@@ -52,9 +50,18 @@ func rbeCommand(ctx Context, config Config, rbeCmd string) string {
 	return cmdPath
 }
 
-func getRBEVars(ctx Context, tmpDir string) map[string]string {
+func getRBEVars(ctx Context, config Config) map[string]string {
 	rand.Seed(time.Now().UnixNano())
-	return map[string]string{"RBE_server_address": fmt.Sprintf("unix://%v/reproxy_%v.sock", tmpDir, rand.Intn(1000))}
+	vars := map[string]string{
+		"RBE_server_address": fmt.Sprintf("unix://%v/reproxy_%v.sock", absPath(ctx, config.TempDir()), rand.Intn(1000)),
+		"RBE_log_path":       config.rbeLogPath(),
+		"RBE_re_proxy":       config.rbeReproxy(),
+		"RBE_exec_root":      config.rbeExecRoot(),
+		"RBE_output_dir":     config.rbeStatsOutputDir(),
+	}
+	k, v := config.rbeAuth()
+	vars[k] = v
+	return vars
 }
 
 func startRBE(ctx Context, config Config) {
@@ -102,7 +109,7 @@ func DumpRBEMetrics(ctx Context, config Config, filename string) {
 		return
 	}
 
-	outputDir := config.RBEStatsOutputDir()
+	outputDir := config.rbeStatsOutputDir()
 	if outputDir == "" {
 		ctx.Fatal("RBE output dir variable not defined. Aborting metrics dumping.")
 	}
@@ -111,6 +118,9 @@ func DumpRBEMetrics(ctx Context, config Config, filename string) {
 	// Stop the proxy first in order to generate the RBE metrics protobuf file.
 	stopRBE(ctx, config)
 
+	if metricsFile == filename {
+		return
+	}
 	if _, err := copyFile(metricsFile, filename); err != nil {
 		ctx.Fatalf("failed to copy %q to %q: %v\n", metricsFile, filename, err)
 	}
diff --git a/ui/build/rbe_test.go b/ui/build/rbe_test.go
index 23a53b449..8ff96bcbb 100644
--- a/ui/build/rbe_test.go
+++ b/ui/build/rbe_test.go
@@ -83,24 +83,13 @@ func TestDumpRBEMetrics(t *testing.T) {
 func TestDumpRBEMetricsErrors(t *testing.T) {
 	ctx := testContext()
 	tests := []struct {
-		description         string
-		rbeOutputDirDefined bool
-		bootstrapProgram    string
-		expectedErr         string
+		description      string
+		bootstrapProgram string
+		expectedErr      string
 	}{{
-		description:      "output_dir not defined",
-		bootstrapProgram: rbeBootstrapProgram,
-		expectedErr:      "RBE output dir variable not defined",
-	}, {
-		description:         "stopRBE failed",
-		rbeOutputDirDefined: true,
-		bootstrapProgram:    "#!/bin/bash\nexit 1\n",
-		expectedErr:         "shutdown failed",
-	}, {
-		description:         "failed to copy metrics file",
-		rbeOutputDirDefined: true,
-		bootstrapProgram:    "#!/bin/bash\n",
-		expectedErr:         "failed to copy",
+		description:      "stopRBE failed",
+		bootstrapProgram: "#!/bin/bash\nexit 1\n",
+		expectedErr:      "shutdown failed",
 	}}
 
 	for _, tt := range tests {
@@ -124,10 +113,6 @@ func TestDumpRBEMetricsErrors(t *testing.T) {
 			env.Set("OUT_DIR", tmpDir)
 			env.Set("RBE_DIR", tmpDir)
 
-			if tt.rbeOutputDirDefined {
-				env.Set("RBE_output_dir", t.TempDir())
-			}
-
 			config := Config{&configImpl{
 				environ: env,
 			}}