diff --git a/flake.lock b/flake.lock
index fae784c..224abba 100644
--- a/flake.lock
+++ b/flake.lock
@@ -23,11 +23,11 @@
         "rust-analyzer-src": "rust-analyzer-src"
       },
       "locked": {
-        "lastModified": 1773732206,
-        "narHash": "sha256-HKibxaUXyWd4Hs+ZUnwo6XslvaFqFqJh66uL9tphU4Q=",
+        "lastModified": 1786348189,
+        "narHash": "sha256-tnTpFky6/GeXVMBO+hLJK2jWS4J8TYloL+rqRME9gAk=",
         "owner": "nix-community",
         "repo": "fenix",
-        "rev": "0aa13c1b54063a8d8679b28a5cd357ba98f4a56b",
+        "rev": "a0b1aef63d7e9c5568958e0d90f6fe48f0f4a7a2",
         "type": "github"
       },
       "original": {
@@ -56,16 +56,16 @@
     },
     "nixpkgs": {
       "locked": {
-        "lastModified": 1764521362,
-        "narHash": "sha256-M101xMtWdF1eSD0xhiR8nG8CXRlHmv6V+VoY65Smwf4=",
-        "owner": "nixos",
+        "lastModified": 1786313170,
+        "narHash": "sha256-9BG7OgUWdu0ONDO5X2q6+K4bsuBITkX/3W4nNJu1Ito=",
+        "owner": "NixOS",
         "repo": "nixpkgs",
-        "rev": "871b9fd269ff6246794583ce4ee1031e1da71895",
+        "rev": "fcb8fcd6bf2d0adecae5bd491afaaaf8311b758d",
         "type": "github"
       },
       "original": {
-        "owner": "nixos",
-        "ref": "25.11",
+        "owner": "NixOS",
+        "ref": "nixos-26.05",
         "repo": "nixpkgs",
         "type": "github"
       }
@@ -99,11 +99,11 @@
     "rust-analyzer-src": {
       "flake": false,
       "locked": {
-        "lastModified": 1773697963,
-        "narHash": "sha256-xdKI77It9PM6eNrCcDZsnP4SKulZwk8VkDgBRVMnCb8=",
+        "lastModified": 1786285255,
+        "narHash": "sha256-zJukKxGKLxcO7E6+P49Qe6XaSbbyGG44kFvQYLWaD3M=",
         "owner": "rust-lang",
         "repo": "rust-analyzer",
-        "rev": "2993637174252ff60a582fd1f55b9ab52c39db6d",
+        "rev": "57411b3a0fb0181ed5965f6541d5ed39a9d79d4c",
         "type": "github"
       },
       "original": {
diff --git a/flake.nix b/flake.nix
index d950d22..aab20bd 100644
--- a/flake.nix
+++ b/flake.nix
@@ -2,7 +2,7 @@
   description = "MDK Server";
 
   inputs = {
-    nixpkgs.url = "github:nixos/nixpkgs/25.11";
+    nixpkgs.url = "github:NixOS/nixpkgs/nixos-26.05";
     flake-utils.url = "github:numtide/flake-utils";
     fenix = {
       url = "github:nix-community/fenix";
diff --git a/src/daemon/api/invoices.rs b/src/daemon/api/invoices.rs
index d5b84c6..7b4f0a6 100644
--- a/src/daemon/api/invoices.rs
+++ b/src/daemon/api/invoices.rs
@@ -221,7 +221,7 @@ pub async fn handle_list_outgoing_payments(
     }
 
     // Newest first.
-    payments.sort_by(|a, b| b.created_at.cmp(&a.created_at));
+    payments.sort_by_key(|p| std::cmp::Reverse(p.created_at));
 
     let page = payments.into_iter().skip(offset).take(limit).collect();
     Ok(Json(page))