looks fine

system/all/restic.nix

@@ -8,10 +8,10 @@
     };
   };
 
-  config = {
+  config = let
+    servers = ["porani" "workhorse" "workout"];
+    dirs = config.backup.all.restic.dirs;
 
-  backup.services.restic =
-    let
     setup = server: {
       passwordFile = toString <secrets/backup/restic-repo>;
       repo = "sftp::backup/remote-${config.networking.hostName}";
@@ -24,13 +24,30 @@
         OnCalendar = "daily";
         Persistent = "true";
       };
-        dirs = config.backup.all.restic.dirs;
+      dirs = dirs;
     };
-    in
-    {
-      "on-porani" = setup "porani.private";
-      "on-workhorse" = setup "workhorse.private";
-      "on-workout" = setup "workout.private";
+
+    hostname = config.networking.hostName;
+    infoEntry = server: {
+      restic = {
+        folders = dirs;
+        from = hostname;
+        to = server;
       };
     };
+
+  in {
+
+    backup.services.restic = lib.zipAttrsWith
+    (name: vals: lib.head vals)
+    (map (server: {
+      "on-${server}" = setup "${server}.private";
+    }) servers);
+
+    environment.etc."info/restic-${hostname}.json" = {
+      enable = true;
+      text = builtins.toJSON (map infoEntry servers);
+    };
+  };
+
 }