diff --git a/book/install/chapter.tex b/book/install/chapter.tex
index 32a3364..6999526 100644
--- a/book/install/chapter.tex
+++ b/book/install/chapter.tex
@@ -49,7 +49,7 @@ would do.}%
 To download, compile and ``install'' the toolchain:
 
 \begin{tty}
-mkdir ~/projects/riscv
+mkdir -p ~/projects/riscv
 cd ~/projects/riscv
 git clone --recursive https://github.com/riscv/riscv-gnu-toolchain
 cd riscv-gnu-toolchain