chore: fix gh pages

Author: Pegasust

.github/workflows/gh-pages.yaml

@@ -15,6 +15,7 @@ jobs:
 
       - uses: nixbuild/nix-quick-install-action@v25
 
+      - run: nix store add-path --name source .
       - run: nix develop .#book -c mdbook build ./docs
 
       - name: Deploy