Add /nix/store bck to store image

nixos-modules/genode-core.nix

@@ -75,18 +75,21 @@ let
               config.genode.core.romModules)))
           }] } ]'');
 
-    extraRoutes = lib.concatStringsSep ", " (lib.lists.flatten
-      (lib.mapAttrsToList (name: value:
-        map (suffix: ''
-          { service =
-            { name = "ROM"
-            , label =
-                Sigil.Init.LabelSelector.Type.Partial
-                  { prefix = Some "nixos -> ${name}", suffix = Some "${suffix}" }
+    extraRoutes = lib.concatStringsSep ", " (lib.lists.flatten (let
+      toRoutes = prefix:
+        lib.mapAttrsToList (name: value:
+          map (suffix: ''
+            { service =
+              { name = "ROM"
+              , label =
+                  Sigil.Init.LabelSelector.Type.Partial
+                    { prefix = Some "${prefix}${name}", suffix = Some "${suffix}" }
+              }
+            , route = Sigil.Init.Route.parent (Some "${suffix}")
             }
-          , route = Sigil.Init.Route.parent (Some "${suffix}")
-          }
-        '') value.coreROMs) config.genode.init.children));
+          '') value.coreROMs);
+    in (toRoutes "" config.genode.core.children)
+    ++ (toRoutes "nixos -> " config.genode.init.children)));
 
     extraCoreChildren = "[ ${
         lib.concatStringsSep ", " (lib.mapAttrsToList
@@ -293,24 +296,25 @@ in {
       image = pkgs.callPackage "${modulesPath}/../lib/make-iso9660-image.nix" {
         contents = erisContents;
         compressImage = true;
+        storeContents = lib.attrsets.mapAttrsToList (name: child: {
+          object = child.configFile;
+          symlink = "/config/${name}";
+        }) config.genode.init.children;
         volumeID = "sigil-store";
       } + "/iso/cd.iso.zst";
       guid = lib.uuidFrom (toString image);
     };
 
-    virtualisation.diskImage =
-      import ./lib/make-bootable-image.nix { inherit config lib pkgs; };
+    virtualisation.diskImage = if config.genode.core.storeBackend == "fs" then
+      import ./lib/make-bootable-image.nix { inherit config lib pkgs; }
+    else
+      null;
 
     virtualisation.useBootLoader = config.genode.core.storeBackend == "fs";
 
-    virtualisation.qemu.options = let
-      blockCommon =
-        [ "-bios ${pkgs.buildPackages.buildPackages.OVMF.fd}/FV/OVMF.fd" ];
-    in {
-      fs = blockCommon;
-      net = [ ];
-      memory = [ ];
-    }.${config.genode.core.storeBackend};
+    virtualisation.qemu.options = {
+      fs = [ "-bios ${pkgs.buildPackages.buildPackages.OVMF.fd}/FV/OVMF.fd" ];
+    }.${config.genode.core.storeBackend} or [ ];
 
   };