diff --git a/flake.lock b/flake.lock
index ff97ea0..47a5d68 100644
--- a/flake.lock
+++ b/flake.lock
@@ -258,18 +258,15 @@
     },
     "nixpkgs": {
       "locked": {
-        "lastModified": 1747744144,
-        "narHash": "sha256-W7lqHp0qZiENCDwUZ5EX/lNhxjMdNapFnbErcbnP11Q=",
-        "owner": "NixOS",
-        "repo": "nixpkgs",
+        "lastModified": 1747794093,
+        "narHash": "sha256-70Oy39tEBH6YRE4tFjEO9+ioH4C2kUTTybpXc67phd8=",
         "rev": "2795c506fe8fb7b03c36ccb51f75b6df0ab2553f",
-        "type": "github"
+        "type": "tarball",
+        "url": "https://releases.nixos.org/nixos/unstable/nixos-25.11pre803506.2795c506fe8f/nixexprs.tar.xz"
       },
       "original": {
-        "owner": "NixOS",
-        "ref": "nixos-unstable",
-        "repo": "nixpkgs",
-        "type": "github"
+        "type": "tarball",
+        "url": "https://uku.moe/unstable.tar.xz"
       }
     },
     "root": {
diff --git a/flake.nix b/flake.nix
index 9be34c3..8b1b859 100644
--- a/flake.nix
+++ b/flake.nix
@@ -57,7 +57,7 @@
     };
 
   inputs = {
-    nixpkgs.url = "github:NixOS/nixpkgs?ref=nixos-unstable";
+    nixpkgs.url = "https://uku.moe/unstable.tar.xz";
 
     camasca = {
       url = "git+https://git.uku3lig.net/uku/camasca";