diff --git a/default.nix b/default.nix
index 7c7ad0b..28b94af 100644
--- a/default.nix
+++ b/default.nix
@@ -55,6 +55,24 @@ rec {
     mkdir $out
     cp ${./static}/* $out
   '';
+  # nixpkgs currently has an old version of mdBook. A new version is
+  # built here, but eventually the update will be upstreamed
+  # (nixpkgs#65890)
+  mdbook = rustPlatform.buildRustPackage rec {
+    name = "mdbook-${version}";
+    version = "0.3.1";
+    doCheck = false;
+
+    src = fetchFromGitHub {
+      owner = "rust-lang-nursery";
+      repo = "mdBook";
+      rev = "v${version}";
+      sha256 = "0py69267jbs6b7zw191hcs011cm1v58jz8mglqx3ajkffdfl3ghw";
+    };
+
+    cargoSha256 = "0qwhc42a86jpvjcaysmfcw8kmwa150lmz01flmlg74g6qnimff5m";
+  };
+
 
   # Wrapper script running the Nixery server with the above two data
   # dependencies configured.