diff --git a/cmd/internal/flags/flags.go b/cmd/internal/flags/flags.go
index c61927c3..830bcebb 100644
--- a/cmd/internal/flags/flags.go
+++ b/cmd/internal/flags/flags.go
@@ -21,6 +21,7 @@ var AbiMode int
 var CheckLinkArgs bool
 var CheckLLFiles bool
 var GenLLFiles bool
+var ForceEspClang bool
 
 func AddBuildFlags(fs *flag.FlagSet) {
 	fs.BoolVar(&Verbose, "v", false, "Verbose mode")
@@ -32,6 +33,7 @@ func AddBuildFlags(fs *flag.FlagSet) {
 		fs.BoolVar(&CheckLinkArgs, "check-linkargs", false, "check link args valid")
 		fs.BoolVar(&CheckLLFiles, "check-llfiles", false, "check .ll files valid")
 		fs.BoolVar(&GenLLFiles, "gen-llfiles", false, "generate .ll files for pkg export")
+		fs.BoolVar(&ForceEspClang, "force-espclang", false, "force to use esp-clang")
 	}
 }
 
@@ -56,5 +58,6 @@ func UpdateConfig(conf *build.Config) {
 		conf.CheckLinkArgs = CheckLinkArgs
 		conf.CheckLLFiles = CheckLLFiles
 		conf.GenLL = GenLLFiles
+		conf.ForceEspClang = ForceEspClang
 	}
 }
diff --git a/internal/build/build.go b/internal/build/build.go
index d12c1ebf..2b296cb7 100644
--- a/internal/build/build.go
+++ b/internal/build/build.go
@@ -86,6 +86,7 @@ type Config struct {
 	GenLL         bool // generate pkg .ll files
 	CheckLLFiles  bool // check .ll files valid
 	CheckLinkArgs bool // check linkargs valid
+	ForceEspClang bool // force to use esp-clang
 	Tags          string
 	GlobalNames   map[string][]string // pkg => names
 	GlobalDatas   map[string]string   // pkg.name => data
@@ -159,7 +160,7 @@ func Do(args []string, conf *Config) ([]Package, error) {
 		conf.Goarch = runtime.GOARCH
 	}
 	// Handle crosscompile configuration first to set correct GOOS/GOARCH
-	forceEspClang := conf.Target != ""
+	forceEspClang := conf.ForceEspClang || conf.Target != ""
 	export, err := crosscompile.Use(conf.Goos, conf.Goarch, conf.Target, IsWasiThreadsEnabled(), forceEspClang)
 	if err != nil {
 		return nil, fmt.Errorf("failed to setup crosscompile: %w", err)