diff --git a/shell.nix b/shell.nix
index 9440073..d4e3047 100644
--- a/shell.nix
+++ b/shell.nix
@@ -3,5 +3,5 @@
 with pkgs;
 
 mkShell rec {
-  packages = [ cargo-make mdbook ];
+  packages = [ cargo-make mdbook mdbook-linkcheck ];
 }