diff --git a/doc/build-unix.md b/doc/build-unix.md
--- a/doc/build-unix.md
+++ b/doc/build-unix.md
@@ -228,7 +228,7 @@
 -----------------------------------
 This example lists the steps necessary to setup and build a command line only, non-wallet distribution of the latest changes on Arch Linux:
 
-    pacman -S boost cmake git libevent ninja python
+    pacman -S boost cmake clang git libevent ninja python
     git clone https://github.com/Bitcoin-ABC/bitcoin-abc.git
     cd bitcoin-abc/
     mkdir build