diff --git a/llvm-build/README.md b/llvm-build/README.md
index fd76e9fcf7559f59ce802ea6c7e313fb0e4655e7..17ea083e6ae20d626dcc4ae06d199a6e623b0562 100644
--- a/llvm-build/README.md
+++ b/llvm-build/README.md
@@ -24,12 +24,27 @@ repo forall -c 'git lfs pull'
 ```
 </br>
 
+
 ### Toolchain build process
 
 Here is an example of starting build process on Linux or MacOS:
 ```
 # update prebuilts, no need to run each time
 ./toolchain/llvm-project/llvm-build/env_prepare.sh
+
+# Choose which dependencies to install based on your system
+> mac x86-64 
+brew install swig
+
+> mac arm64 (m1/m2)
+install Homebrew
+brew install git-lfs java coreutils wget
+softlink prebuilts/cmake/darwin-arm64/bin/cmake -> your local
+softlink prebuilts/cmake/darwin-arm64/bin/ninja -> your local
+
+> ubuntu x86-64
+sudo apt-get install build-essential swig python3-dev libedit-dev libncurses5-dev binutils-dev
+
 # build
 python3 ./toolchain/llvm-project/llvm-build/build.py
 ```