diff --git a/README.md b/README.md
index 6034751..e24f37a 100644
--- a/README.md
+++ b/README.md
@@ -203,7 +203,7 @@ Compilation depends on platform, but for a Unix PC it goes something like this:
 
 ```
 # install SDL2, e.g. on Debian-like systems:
-sudo apt-get install libsdl2-dev libsdl2-mixer-dev
+sudo apt install libsdl2-dev libsdl2-mixer-dev libgbm-dev
 
 # get the source code:
 git clone https://gitlab.com/drummyfish/anarch.git