fix: nix desktop workflow (#8747)

Co-authored-by: Github Action <action@github.com>

.github/workflows/nix-desktop.yml

@@ -25,6 +25,8 @@ jobs:
       matrix:
         os:
           - blacksmith-4vcpu-ubuntu-2404
+          - blacksmith-4vcpu-ubuntu-2404-arm
+          - macos-15
           - macos-latest
     runs-on: ${{ matrix.os }}
     timeout-minutes: 60
@@ -33,7 +35,7 @@ jobs:
         uses: actions/checkout@v6
 
       - name: Setup Nix
-        uses: DeterminateSystems/nix-installer-action@v21
+        uses: nixbuild/nix-quick-install-action@v34
 
       - name: Build desktop via flake
         run: |

.github/workflows/update-nix-hashes.yml

@@ -19,7 +19,7 @@ on:
 jobs:
   update-flake:
     if: github.event_name != 'pull_request' || github.event.pull_request.head.repo.full_name == github.repository
-    runs-on: ubuntu-latest
+    runs-on: blacksmith-4vcpu-ubuntu-2404
     env:
       TITLE: flake.lock
 
@@ -101,9 +101,9 @@ jobs:
       matrix:
         include:
           - system: x86_64-linux
-            host: ubuntu-latest
+            host: blacksmith-4vcpu-ubuntu-2404
           - system: aarch64-linux
-            host: ubuntu-22.04-arm
+            host: blacksmith-4vcpu-ubuntu-2404-arm
           - system: x86_64-darwin
             host: macos-15-intel
           - system: aarch64-darwin