diff --git a/Build.md b/Build.md
index 4a081b4..80cfce7 100644
--- a/Build.md
+++ b/Build.md
@@ -246,6 +246,7 @@ these releases.  You must either:
 2. Get prebuilt LLVM+Clang from other sources, e.g. MSYS2, [Chocolatey](https://chocolatey.org/packages/llvm).
 
 #### Build clang+llvm by yourself
+##### Note: You may need to execute these commands in the "Developer Command Prompt for VS"
 
 ```sh
 git clone https://github.com/llvm/llvm-project.git