diff --git a/bin/backlight_helper/ddcci/ddcci.go b/bin/backlight_helper/ddcci/ddcci.go

index 21653459..e1fefac2 100644

--- a/bin/backlight_helper/ddcci/ddcci.go

+++ b/bin/backlight_helper/ddcci/ddcci.go

@@ -113,12 +113,12 @@ func newDDCCI() (*ddcci, error) {

 		return nil, err

 	}

-	content, err := exec.Command("/usr/bin/dpkg-architecture", "-qDEB_HOST_MULTIARCH").Output() // TODO: arch和rpm打包需要通过patch修改获取路径的方式

+	content, err := exec.Command("/usr/bin/pkg-config", "ddcutil", "--variable=libdir").Output()

 	if err != nil {

 		logger.Warning(err)

 	} else {

-		path := filepath.Join("/usr/lib", strings.TrimSpace(string(content)), "libddcutil.so.0")

-		logger.Debug("so path:", path)

+		libdir := strings.TrimSpace(string(content))

+		path := filepath.Join(libdir, "libddcutil.so")

 		cStr := C.CString(path)

 		defer C.free(unsafe.Pointer(cStr))

 		ret := C.InitDDCCISo(cStr)