Update Nix channel + GitHub workflow actions.

Author: brocaar

.github/workflows/main.yml

@@ -13,15 +13,15 @@ jobs:
     steps:
       -
         name: Checkout
-        uses: actions/checkout@v4
+        uses: actions/checkout@v6
       - 
         name: Install Nix
         uses: cachix/install-nix-action@v31
         with:
-          nix_path: nixpkgs=channel:nixos-25.05
+          nix_path: nixpkgs=channel:nixos-25.11
       -
         name: Cargo cache
-        uses: actions/cache@v4
+        uses: actions/cache@v5
         with:
           path: |
             ~/.cargo/bin/
@@ -53,15 +53,15 @@ jobs:
     steps:
       -
         name: Checkout
-        uses: actions/checkout@v4
+        uses: actions/checkout@v6
       - 
         name: Install Nix
         uses: cachix/install-nix-action@v31
         with:
-          nix_path: nixpkgs=channel:nixos-25.05
+          nix_path: nixpkgs=channel:nixos-25.11
       -
         name: Cargo cache
-        uses: actions/cache@v4
+        uses: actions/cache@v5
         with:
           path: |
             ~/.cargo/bin/
@@ -78,7 +78,7 @@ jobs:
         run: nix-shell --command "make dist-${{ matrix.target }}"
       -
         name: Configure AWS credentials
-        uses: aws-actions/configure-aws-credentials@v4
+        uses: aws-actions/configure-aws-credentials@v5
         with:
           aws-access-key-id: ${{ secrets.AWS_ACCESS_KEY_ID }}
           aws-secret-access-key: ${{ secrets.AWS_SECRET_ACCESS_KEY }}

shell.nix

@@ -1,4 +1,4 @@
-{ pkgs ? import (fetchTarball "https://github.com/NixOS/nixpkgs/archive/nixos-25.05.tar.gz") {} }:
+{ pkgs ? import (fetchTarball "https://github.com/NixOS/nixpkgs/archive/nixos-25.11.tar.gz") {} }:
 
 pkgs.mkShell {
   buildInputs = [