ci: drop cachix step and bump nixos version

Author: mrnossiom

.github/workflows/nix.yml

@@ -1,5 +1,7 @@
 name: Nix
-on: [push, pull_request]
+on:
+  - push
+  - pull_request
 
 jobs:
   build:
@@ -11,12 +13,6 @@ jobs:
         with:
           github_access_token: ${{ secrets.GITHUB_TOKEN }}
 
-      - name: Setup Cachix
-        uses: cachix/cachix-action@v13
-        with:
-          name: mrnossiom
-          authToken: ${{ secrets.CACHIX_AUTH_TOKEN }}
-
       - name: Check flake structure
         run: nix flake check
 

flake.lock

@@ -1,6 +1,7 @@
 {
   inputs = {
-    nixpkgs.url = "github:NixOS/nixpkgs/nixos-24.11";
+    # nixpkgs.url = "github:NixOS/nixpkgs/nixos-24.11";
+    nixpkgs.url = "github:NixOS/nixpkgs/nixos-unstable";
 
     rust-overlay.url = "github:oxalica/rust-overlay";
     rust-overlay.inputs.nixpkgs.follows = "nixpkgs";