diff --git a/shell.nix b/shell.nix
index 0e1b6ad..fdf7e04 100644
--- a/shell.nix
+++ b/shell.nix
@@ -9,6 +9,7 @@ pkgs.mkShell {
     ];
     propagatedBuildInputs = with pkgs; [
         stdenv.cc.cc.lib
+        cairo
     ];
 
     venvDir = "./venv";