diff --git a/llvm-build/README.md b/llvm-build/README.md
index f0b202f79bd8e427245ff1e1583c525e8a854e4f..a1dfc1f1e4dfb09d7fb36f68f96d57b5ecccc07b 100644
--- a/llvm-build/README.md
+++ b/llvm-build/README.md
@@ -20,7 +20,7 @@ MacOS X >= 10.15.4
 
 ubuntu 
 ```
-sudo apt-get install build-essential swig python3-dev libedit-dev libncurses5-dev binutils-dev gcc-multilib abigail-tools elfutils
+sudo apt-get install build-essential swig python3-dev libedit-dev libncurses5-dev binutils-dev gcc-multilib abigail-tools elfutils pkg-config autoconf autoconf-archive
 ```
 mac 
 ```