Add custom registry entry for jupyterlab flake

flake.nix

@@ -76,6 +76,16 @@
                 registry = {
                   nixpkgs.flake = nixpkgs;
                   nixos.flake = self;
+                  jupyter = {
+                    from = {
+                      type = "indirect";
+                      id = "jupyter";
+                    };
+                    to = {
+                      type = "git";
+                      url = "https://git.xenia.me.uk/xenia/nix-jupyter.git";
+                    };
+                  };
                 };
                 gc = {
                   automatic = true;