diff --git a/README.md b/README.md
index b632fdb..37f64ae 100644
--- a/README.md
+++ b/README.md
@@ -11,13 +11,13 @@ This repository is originated from [this](https://github.com/JiapengLi/OpenWrt-l
 
 ## Patch
 packet-forwarder requires function qsort_r which is not avaiable in neither musl library 1.1.15 nor 1.1.16.
-We need [patch](https://github.com/xueliu/lora-feed/blob/master/101-added_qsort_r.patch) the toolchain to support qsort_r.
+Therefore we should [patch](https://github.com/xueliu/lora-feed/blob/master/101-added_qsort_r.patch) the toolchain at first.
 
     $ cp 101-added_qsort_r.patch $SOURCE_TREE/toolchain/musl/patches
     $ make toolchain/clean
     $ make toolchain/compile
     $ make toolchain/install
-Note: Please make sure that the musl library is updated in the file system.
+Note: Please make sure that the musl library is updated in the file system. You could reinstall libc_1.1.15-1_pistachio.ipk to update your existing system.
 
 ## Install
 
@@ -29,7 +29,7 @@ Edit your feeds.conf or feed.conf.default and add the following to it:
 Update your build environment and install the package:
 
     $ scripts/feeds update lora
-    $ scripts/feeds install lora
+    $ scripts/feeds install -p lora
     $ make menuconfig
 
 Go to Libraries Network, select libloragw, input the SPI device path you will use in your dev board;