diff --git a/README.md b/README.md
index 6b7909f..f5361d1 100644
--- a/README.md
+++ b/README.md
@@ -58,10 +58,16 @@ Raspberry Pi 2/3/4 with GNU/Linux.
   is necessary to have Arm/Linux installed in your build environment.
 * Install [GNU Toolchain for the A-profile Architecture](https://developer.arm.com/tools-and-software/open-source-software/developer-tools/gnu-toolchain/gnu-a/downloads)
     - Select `arm-linux-none-gnueabihf` (AArch32 target with hard float)
+```shell 
+$ sudo apt-get install gcc-arm-linux-gnueabihf 
+
+# set QEMU_LD_PREFIX path
+$ export QEMU_LD_PREFIX=/usr/arm-linux-gnueabihf
+```
 
 * Install QEMU for Arm user emulation
 ```shell
-sudo apt-get install qemu-user
+$ sudo apt-get install qemu-user
 ```
 
 ## Running AMaCC
@@ -80,6 +86,7 @@ OK
 
 Check the messages generated by `make help` to learn more.
 
+
 ## Benchmark
 AMaCC is able to generate machine code really fast and provides 70% of the performance of `gcc -O0`.
 
@@ -105,4 +112,4 @@ AMaCC is based on the infrastructure of [c4](https://github.com/rswier/c4).
 ## Related Materials
 * [Curated list of awesome resources on Compilers, Interpreters and Runtimes](http://aalhour.com/awesome-compilers/)
 * [Hacker News discussions](https://news.ycombinator.com/item?id=11411124)
-* [A Compiler Writing Journey](https://github.com/DoctorWkt/acwj) by Warren Toomey.
+* [A Compiler Writing Journey](https://github.com/DoctorWkt/acwj) by Warren Toomey.
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