diff --git a/.github/workflows/build_nix.yml b/.github/workflows/build_nix.yml
index 8d168f2..cf54fae 100644
--- a/.github/workflows/build_nix.yml
+++ b/.github/workflows/build_nix.yml
@@ -7,8 +7,5 @@ jobs:
     runs-on: self-hosted
     steps:
     - uses: actions/checkout@v4
-    - uses: cachix/install-nix-action@v27
-      with:
-        github_access_token: ${{ secrets.GITHUB_TOKEN }}
     - run: nix build
     - run: nix flake check
diff --git a/.github/workflows/update-flake.yml b/.github/workflows/update-flake.yml
index 97801da..1595b9e 100644
--- a/.github/workflows/update-flake.yml
+++ b/.github/workflows/update-flake.yml
@@ -10,6 +10,8 @@ jobs:
     steps:
       - name: Checkout repository
         uses: actions/checkout@v4
+      - name: Check flake
+        uses: DeterminateSystems/flake-checker-action@main
       - name: Update Nix Flake Lock
         uses: DeterminateSystems/update-flake-lock@main
         with:
diff --git a/flake.lock b/flake.lock
index 72d8080..77d336a 100644
--- a/flake.lock
+++ b/flake.lock
@@ -23,16 +23,16 @@
     },
     "nixpkgs": {
       "locked": {
-        "lastModified": 1729256560,
-        "narHash": "sha256-/uilDXvCIEs3C9l73JTACm4quuHUsIHcns1c+cHUJwA=",
+        "lastModified": 1729462439,
+        "narHash": "sha256-gpq5GiQF3psJ7UeclSA8SlOrHYkhywLf9a/Si6mxODM=",
         "owner": "nixos",
         "repo": "nixpkgs",
-        "rev": "4c2fcb090b1f3e5b47eaa7bd33913b574a11e0a0",
+        "rev": "f475eae805c96e954789505bb128945c7613abe4",
         "type": "github"
       },
       "original": {
         "owner": "nixos",
-        "ref": "nixos-unstable",
+        "ref": "master",
         "repo": "nixpkgs",
         "type": "github"
       }