diff --git a/README.md b/README.md
index d3bceb9..6e9e21c 100644
--- a/README.md
+++ b/README.md
@@ -56,9 +56,9 @@ For more details see the [action.yaml](./action.yml) file.
 
 | Name | Size | Size Change | NAR Size | NAR Size Change |
 |------|-----:|------------:|---------:|----------------:|
-| `gemini` |        11Gi |   -2.4Mi |  28Ki | 0 |
-| `leo` |      1.6Gi | 0 |  25Ki | 0 |
-| `libra` |       9.4Gi |   -2.4Mi |  28Ki | 0 |
-| `taurus` |      7.6Gi | 0 |  34Ki | 0 |
+| `gemini` | 11Gi | -2.4Mi | 28Ki | 0 |
+| `leo` | 1.6Gi | 0 | 25Ki | 0 |
+| `libra` | 9.4Gi | -2.4Mi | 28Ki | 0 |
+| `taurus` | 7.6Gi | 0 | 34Ki | 0 |
 
 </details>
diff --git a/flake.lock b/flake.lock
index 7e05325..a6376f4 100644
--- a/flake.lock
+++ b/flake.lock
@@ -20,18 +20,15 @@
     },
     "nixpkgs": {
       "locked": {
-        "lastModified": 1741513245,
-        "narHash": "sha256-7rTAMNTY1xoBwz0h7ZMtEcd8LELk9R5TzBPoHuhNSCk=",
-        "owner": "NixOS",
-        "repo": "nixpkgs",
-        "rev": "e3e32b642a31e6714ec1b712de8c91a3352ce7e1",
-        "type": "github"
+        "lastModified": 1752076035,
+        "narHash": "sha256-ROMKbpfgrbogAWXNXJxUu+BoPyZdOq/MQ3UNYVP863o=",
+        "rev": "9807714d6944a957c2e036f84b0ff8caf9930bc0",
+        "type": "tarball",
+        "url": "https://releases.nixos.org/nixos/unstable/nixos-25.11pre826938.9807714d6944/nixexprs.tar.xz?rev=9807714d6944a957c2e036f84b0ff8caf9930bc0"
       },
       "original": {
-        "owner": "NixOS",
-        "ref": "nixos-unstable",
-        "repo": "nixpkgs",
-        "type": "github"
+        "type": "tarball",
+        "url": "https://channels.nixos.org/nixos-unstable/nixexprs.tar.xz"
       }
     },
     "nixpkgs-lib": {
diff --git a/flake.nix b/flake.nix
index 46e3e7b..35db44f 100644
--- a/flake.nix
+++ b/flake.nix
@@ -3,7 +3,7 @@
 
   inputs = {
     flake-parts.url = "github:hercules-ci/flake-parts";
-    nixpkgs.url = "github:NixOS/nixpkgs/nixos-unstable";
+    nixpkgs.url = "https://channels.nixos.org/nixos-unstable/nixexprs.tar.xz";
     treefmt-nix = {
       url = "github:numtide/treefmt-nix";
       inputs.nixpkgs.follows = "nixpkgs";