diff --git a/flake.nix b/flake.nix
index 010181fb..3f86cb42 100644
--- a/flake.nix
+++ b/flake.nix
@@ -92,6 +92,7 @@
           # Useful for editing the book locally
           mdbook
         ])
+        ++ scope.main.buildInputs
         ++ scope.main.propagatedBuildInputs
         ++ scope.main.nativeBuildInputs;