diff --git a/flake.lock b/flake.lock
index 350c4dd1..384bd275 100644
--- a/flake.lock
+++ b/flake.lock
@@ -915,7 +915,7 @@
         "type": "github"
       }
     },
-    "nixpkgs_2": {
+    "nixpkgs-gitea": {
       "locked": {
         "lastModified": 1790323409,
         "narHash": "sha256-VVTPf+Hyd5ebpjBMHmrLMSBIeW6ls48Bqtosj7CNKLA=",
@@ -931,6 +931,22 @@
         "type": "github"
       }
     },
+    "nixpkgs_2": {
+      "locked": {
+        "lastModified": 1779796641,
+        "narHash": "sha256-ZsIrKmhp4vbBXoXXmR/tBXA/UCsAQiJL9vsgZEduhVY=",
+        "owner": "NixOS",
+        "repo": "nixpkgs",
+        "rev": "25f538306313eae3927264466c70d7001dcea1df",
+        "type": "github"
+      },
+      "original": {
+        "owner": "NixOS",
+        "ref": "nixos-25.11",
+        "repo": "nixpkgs",
+        "type": "github"
+      }
+    },
     "nixvim": {
       "inputs": {
         "flake-parts": "flake-parts_2",
@@ -1018,6 +1034,7 @@
         "nixos-mailserver": "nixos-mailserver",
         "nixos-wsl": "nixos-wsl",
         "nixpkgs": "nixpkgs_2",
+        "nixpkgs-gitea": "nixpkgs-gitea",
         "nixvim": "nixvim",
         "rust-overlay": "rust-overlay_2",
         "sops-nix": "sops-nix"
diff --git a/flake.nix b/flake.nix
index e4a3ce44..a76613a4 100644
--- a/flake.nix
+++ b/flake.nix
@@ -12,7 +12,8 @@
   };
 
   inputs = {
-  nixpkgs.url = "github:NixOS/nixpkgs/nixos-unstable";
+    nixpkgs.url = "github:NixOS/nixpkgs/nixos-25.11";
+    nixpkgs-gitea.url = "github:NixOS/nixpkgs/nixos-unstable";
     rust-overlay = {
       url = "github:oxalica/rust-overlay";
       inputs = {
diff --git a/package/default.nix b/package/default.nix
index 96e3e1cb..459dcd11 100644
--- a/package/default.nix
+++ b/package/default.nix
@@ -1,4 +1,8 @@
-{ self, pkgs, inputs, ... }: let
+{ self, pkgs, inputs, system, ... }: let
+  giteaPkgs = import inputs.nixpkgs-gitea {
+    inherit system;
+    config = pkgs.config;
+  };
   rust = {
     nativeBuildInputs = [
       pkgs.pkgsBuildHost.rust-bin.stable."1.81.0".default
@@ -135,7 +139,9 @@ in {
   c-hectic                     = pkgs.callPackage ./c/hectic/default.nix              {};
   watch                        = pkgs.callPackage ./c/watch/default.nix               {};
   support-bot                  = pkgs.callPackage ./support-bot                       {};
-  gitea-heatmap                = pkgs.callPackage ./gitea                             {};
+  gitea-heatmap                = giteaPkgs.callPackage ./gitea {
+    nixosTests = pkgs.nixosTests;
+  };
   gitea-runner-nix-image       = pkgs.callPackage ./gitea-runner-nix-image            {};
   gitea-runner-controller      = pkgs.callPackage ./gitea-runner-controller           {};
   nix-derivation-hash          = pkgs.callPackage ./nix-derivation-hash               {};