install sogo from 24.11

flake.lock

@@ -297,6 +297,22 @@
         "type": "github"
       }
     },
+    "nixpkgs-legacy": {
+      "locked": {
+        "lastModified": 1750646418,
+        "narHash": "sha256-4UAN+W0Lp4xnUiHYXUXAPX18t+bn6c4Btry2RqM9JHY=",
+        "owner": "nixos",
+        "repo": "nixpkgs",
+        "rev": "1f426f65ac4e6bf808923eb6f8b8c2bfba3d18c5",
+        "type": "github"
+      },
+      "original": {
+        "owner": "nixos",
+        "ref": "nixos-24.11",
+        "repo": "nixpkgs",
+        "type": "github"
+      }
+    },
     "nixpkgs-lib": {
       "locked": {
         "lastModified": 1748740939,
@@ -482,6 +498,7 @@
         "kpp": "kpp",
         "nix-index-database": "nix-index-database",
         "nixpkgs": "nixpkgs_3",
+        "nixpkgs-legacy": "nixpkgs-legacy",
         "notenrechner": "notenrechner",
         "print-interface": "print-interface",
         "sops-nix": "sops-nix",

flake.nix

@@ -1,6 +1,7 @@
 {
   inputs = {
     nixpkgs.url = "github:nixos/nixpkgs/nixos-25.05";
+    nixpkgs-legacy.url = "github:nixos/nixpkgs/nixos-24.11";
     sops-nix.url = "github:Mic92/sops-nix";
     sops-nix.inputs.nixpkgs.follows = "nixpkgs";
     nix-index-database.url = "github:nix-community/nix-index-database";
@@ -29,6 +30,7 @@
   outputs =
     { self
     , nixpkgs
+    , nixpkgs-legacy
     , sops-nix
     , nix-index-database
     , kpp

modules/mail/sogo.nix

@@ -1,4 +1,4 @@
-{ config, lib, ... }:
+{ pkgs, config, lib, nixpkgs-legacy, ... }:
 let
   sogo-hostname = "mail.${config.networking.domain}";
 in
@@ -9,6 +9,11 @@ in
       owner = config.systemd.services.sogo.serviceConfig.User;
     };
   };
+  nixpkgs.overlays =  [
+  (self: super: {
+      sogo = nixpkgs-legacy.legacyPackages."${pkgs.system}".sogo;
+    })
+  ];
 
   services = {
     memcached.enable = true;