diff --git a/openwrt/files/luci/model/cbi/ua3f/utils.lua b/openwrt/files/luci/model/cbi/ua3f/utils.lua
index 6f64f1a..7bd3378 100644
--- a/openwrt/files/luci/model/cbi/ua3f/utils.lua
+++ b/openwrt/files/luci/model/cbi/ua3f/utils.lua
@@ -6,16 +6,30 @@ local function cmd_exists(cmd)
     return sys.call("command -v " .. cmd .. " >/dev/null 2>&1") == 0
 end
 
+local function opkg_installed(pkg)
+    if not cmd_exists("opkg") then return false end
+    local output = sys.exec("opkg list-installed " .. pkg .. " 2>&1")
+    if output:find(pkg, 1, true) then
+        return true
+    end
+    if output:find("Could not lock /var/lock/opkg.lock", 1, true) then
+        return true
+    end
+    return false
+end
+
+local function apk_installed(pkg)
+    if not cmd_exists("apk") then return false end
+    local output = sys.exec("apk info | grep " .. pkg .. " 2>&1")
+    return output:find(pkg, 1, true) ~= nil
+end
+
 function M.nfqueue_exists()
-    local opkg = cmd_exists("opkg") and sys.call("opkg list-installed kmod-nft-queue | grep -q kmod-nft-queue") == 0
-    local apk = cmd_exists("apk") and (sys.call("apk info | grep -q kmod-nft-queue") == 0)
-    return opkg or apk
+    return opkg_installed("kmod-nft-queue") or apk_installed("kmod-nft-queue")
 end
 
 function M.tproxy_exists()
-    local opkg = cmd_exists("opkg") and sys.call("opkg list-installed kmod-nft-tproxy | grep -q kmod-nft-tproxy") == 0
-    local apk = cmd_exists("apk") and (sys.call("apk info | grep -q kmod-nft-tproxy") == 0)
-    return opkg or apk
+    return opkg_installed("kmod-nft-tproxy") or apk_installed("kmod-nft-tproxy")
 end
 
 function M.offloading_enabled()