release: add release-barrier to have an all-green criteria

release.nix

@@ -127,10 +127,27 @@ let
 
   in pkgsClean;
 
-in {
-  "${cfg.prefix}" = pkgs config (self: super: {});
+  # Aggregate all packages job
+  # Use as all-green-criteria
+  allJobs = prefix: jobs: let
+    aggrJob = (nixpkgs-final {}).releaseTools.aggregate {
+      name = "all-packages";
+      constituents = with lib;
+      let
+        a2l = mapAttrsToList (_: path: if (lib.isAttrs path && !isDerivation path) then a2l path else path);
+        pnames =
+          mapAttrsRecursiveCond
+            (as: !(as ? "type" && as.type == "derivation"))
+            (path: v: v)
+            jobs
+          ;
+      in a2l pnames;
+    };
+    in {
+      "${prefix}" = jobs // { release-barrier = aggrJob; };
+    };
 
-} # Extra variants for testing purposes
+in (allJobs cfg.prefix (pkgs config (self: super: {})))
 // (if buildVariants then {
   "${cfg.prefix}-mpich" = pkgs config (self: super: { mpi = super.mpich; });