diff --git a/bx/guide.md b/bx/guide.md
index 186ea86..2b57e8e 100644
--- a/bx/guide.md
+++ b/bx/guide.md
@@ -36,7 +36,7 @@ To install APIO and tinyprog, open up a terminal and run the following commands:
 
 ```shell
 pip install apio==0.4.0b5 tinyprog
-apio install system scons icestorm iverilog
+apio install system scons icestorm iverilog drivers
 apio drivers --serial-enable
 ```