diff --git a/pkg/env/env.go b/pkg/env/env.go
deleted file mode 100644
index ca6d7d6..0000000
--- a/pkg/env/env.go
+++ /dev/null
@@ -1,113 +0,0 @@
-package env
-
-import (
-	"os"
-	"strconv"
-	"sync"
-)
-
-var (
-	once sync.Once
-	mu   sync.Mutex
-	env  *EnvSettings
-	// Can be inject value with -ldflags "-X kcl-lang.io/kcl-go/pkg/env.libHome=/path/to/lib"
-	libHome string
-	// Can be inject value with -ldflags "-X kcl-lang.io/kcl-go/pkg/env.disableInstallArtifact=true"
-	disableInstallArtifact string = "false"
-	// Can be inject value with -ldflags "-X kcl-lang.io/kcl-go/pkg/env.disableArtifactInPath=true"
-	disableArtifactInPath string = "true"
-)
-
-// EnvSettings represents environment settings for the KCL Go SDK.
-type EnvSettings struct {
-	LibHome                  string
-	DisableInstallArtifact   bool
-	DisableUseArtifactInPath bool
-}
-
-// Instance returns a singleton instance of EnvSettings.
-func instance() *EnvSettings {
-	once.Do(func() {
-		env = &EnvSettings{
-			LibHome:                  envOr(os.Getenv("KCL_LIB_HOME"), libHome),
-			DisableInstallArtifact:   envBoolOrString("KCL_GO_DISABLE_INSTALL_ARTIFACT", disableInstallArtifact),
-			DisableUseArtifactInPath: envBoolOrString("KCL_GO_DISABLE_ARTIFACT_IN_PATH", disableArtifactInPath),
-		}
-	})
-	return env
-}
-
-// GetLibHome returns the LibHome value from the singleton instance of EnvSettings.
-// Deprecated: use KCL_LIB_HOME env to set the kcl lib home
-func GetLibHome() string {
-	return instance().LibHome
-}
-
-// SetLibHome sets the LibHome value in the singleton instance of EnvSettings.
-// Deprecated: use KCL_LIB_HOME env to get the kcl lib home
-func SetLibHome(value string) {
-	mu.Lock()
-	defer mu.Unlock()
-	instance().LibHome = value
-}
-
-// SetDisableInstallArtifact sets the DisableInstallArtifact value in the singleton instance of EnvSettings.
-func SetDisableInstallArtifact(value bool) {
-	mu.Lock()
-	defer mu.Unlock()
-	instance().DisableInstallArtifact = value
-}
-
-// GetDisableInstallArtifact returns the DisableInstallArtifact value from the singleton instance of EnvSettings.
-func GetDisableInstallArtifact() bool {
-	return instance().DisableInstallArtifact
-}
-
-// GetDisableUseArtifactInPath returns the DisableUseArtifactInPath value from the singleton instance of EnvSettings.
-func GetDisableUseArtifactInPath() bool {
-	return instance().DisableUseArtifactInPath
-}
-
-// SetDisableUseArtifactInPath sets the DisableUseArtifactInPath value in the singleton instance of EnvSettings.
-func SetDisableUseArtifactInPath(value bool) {
-	mu.Lock()
-	defer mu.Unlock()
-	instance().DisableUseArtifactInPath = value
-}
-
-// Enable the fast eval mode.
-func EnableFastEvalMode() {
-	// Set the fast eval mode for KCL
-	os.Setenv("KCL_FAST_EVAL", "1")
-}
-
-// envOr returns the value of the specified environment variable, or the
-// default value if it does not exist.
-func envOr(name, def string) string {
-	if v, ok := os.LookupEnv(name); ok {
-		return v
-	}
-	return def
-}
-
-// envBoolOr returns the boolean value of the specified environment variable,
-// or the default value if it does not exist.
-func envBoolOr(name string, def bool) bool {
-	if name == "" {
-		return def
-	}
-	envVal := envOr(name, strconv.FormatBool(def))
-	ret, err := strconv.ParseBool(envVal)
-	if err != nil {
-		return def
-	}
-	return ret
-}
-
-// envBoolOrString returns the boolean value of the specified environment variable,
-// or the default string value if it does not exist.
-func envBoolOrString(name string, def string) bool {
-	var ret bool
-	ret, _ = strconv.ParseBool(def)
-	return envBoolOr(name, ret)
-}