flake.lock: Update

Flake lock file updates:

• Updated input 'nixpkgs-unstable':
    'github:NixOS/nixpkgs/dfb2f12e899db4876308eba6d93455ab7da304cd?narHash=sha256-1wxxznpW2CKvI9VdniaUnTT2Os6rdRJcRUf65ZK9OtE%3D' (2025-08-28)
  → 'github:NixOS/nixpkgs/d7600c775f877cd87b4f5a831c28aa94137377aa?narHash=sha256-tlOn88coG5fzdyqz6R93SQL5Gpq%2Bm/DsWpekNFhqPQk%3D' (2025-08-30)

flake.lock

@@ -993,11 +993,11 @@
     },
     "nixpkgs-unstable": {
       "locked": {
-        "lastModified": 1756386758,
-        "narHash": "sha256-1wxxznpW2CKvI9VdniaUnTT2Os6rdRJcRUf65ZK9OtE=",
+        "lastModified": 1756542300,
+        "narHash": "sha256-tlOn88coG5fzdyqz6R93SQL5Gpq+m/DsWpekNFhqPQk=",
         "owner": "NixOS",
         "repo": "nixpkgs",
-        "rev": "dfb2f12e899db4876308eba6d93455ab7da304cd",
+        "rev": "d7600c775f877cd87b4f5a831c28aa94137377aa",
         "type": "github"
       },
       "original": {

hosts/vps1/matrix.nix

@@ -51,6 +51,14 @@ let
       domain = serverName;
     };
   };
+  proxyConfig = ''
+    proxy_set_header        Host $host;
+    proxy_set_header        X-Real-IP $remote_addr;
+    proxy_set_header        X-Forwarded-For $proxy_add_x_forwarded_for;
+    proxy_set_header        X-Forwarded-Proto $scheme;
+    proxy_set_header        X-Forwarded-Host $host;
+    proxy_set_header        X-Forwarded-Server $host;
+  '';
 in
 {
   networking.firewall.allowedTCPPorts = [
@@ -100,14 +108,11 @@ in
       locations = {
         "/" = {
           proxyPass = "http://localhost:8008";
-          extraConfig = ''
-            proxy_set_header X-Forwarded-For $remote_addr;
-          '';
+          extraConfig = proxyConfig;
         };
         "/_matrix" = {
           proxyPass = "http://localhost:8008";
-          extraConfig = ''
-            proxy_set_header X-Forwarded-For $remote_addr;
+          extraConfig = proxyConfig + ''
             client_max_body_size 50M;
           '';
         };