diff --git a/src/cmd/dist/build.go b/src/cmd/dist/build.go
index d920db9b88..8eb6daa3a5 100644
--- a/src/cmd/dist/build.go
+++ b/src/cmd/dist/build.go
@@ -1457,7 +1457,8 @@ func cmdbootstrap() {
 	os.Setenv("CC", compilerEnvLookup("CC", defaultcc, goos, goarch))
 	// Now that cmd/go is in charge of the build process, enable GOEXPERIMENT.
 	os.Setenv("GOEXPERIMENT", goexperiment)
-	goInstall(toolenv(), goBootstrap, toolchain...)
+	// No need to enable PGO for toolchain2.
+	goInstall(toolenv(), goBootstrap, append([]string{"-pgo=off"}, toolchain...)...)
 	if debug {
 		run("", ShowOutput|CheckExit, pathf("%s/compile", tooldir), "-V=full")
 		copyfile(pathf("%s/compile2", tooldir), pathf("%s/compile", tooldir), writeExec)