Add description to jungle flake

.gitea/workflows/ci.yaml

@@ -11,10 +11,10 @@ jobs:
   build:all:
     runs-on: native
     steps:
-      - uses: https://gitea.com/ScMi1/checkout@v1.4
+      - uses: https://jungle.bsc.es/git/actions/checkout@v6-gitea
       - run: nix build -L --no-link --print-out-paths .#bsc.ci.all
   build:cross:
     runs-on: native
     steps:
-      - uses: https://gitea.com/ScMi1/checkout@v1.4
+      - uses: https://jungle.bsc.es/git/actions/checkout@v6-gitea
       - run: nix build -L --no-link --print-out-paths .#bsc.ci.cross

flake.nix

@@ -3,6 +3,8 @@
     nixpkgs.url = "github:NixOS/nixpkgs/nixos-25.11";
   };
 
+  description = "configuration for jungle machines";
+
   outputs = { self, nixpkgs, ... }:
 let
   mkConf = name: nixpkgs.lib.nixosSystem {