add determinate nix installer mirror

.github/workflows/flake-health-checks.yml

@@ -13,7 +13,15 @@ jobs:
             matrix:
                 os: [ubuntu-latest]
         steps:
-            - uses: DeterminateSystems/nix-installer-action@main
+            - name: Get Latest Determinate Nix Installer binary
+              id: latest-installer
+              uses: sigyl-actions/gitea-action-get-latest-release@main
+              with:
+                repository: ahuston-0/determinate-nix-mirror
+            - name: Install nix
+              uses: https://github.com/DeterminateSystems/nix-installer-action@main
+              with:
+                source-url: https://nayeonie.com/ahuston-0/determinate-nix-mirror/releases/download/${{ steps.latest-installer.outputs.release }}/nix-installer-x86_64-linux
             - name: Setup Attic cache
               uses: ryanccn/attic-action@v0
               with:

.github/workflows/flake-update.yml

@@ -11,8 +11,15 @@ jobs:
         steps:
             - name: Checkout repository
               uses: actions/checkout@v4
+            - name: Get Latest Determinate Nix Installer binary
+              id: latest-installer
+              uses: sigyl-actions/gitea-action-get-latest-release@main
+              with:
+                repository: ahuston-0/determinate-nix-mirror
             - name: Install nix
               uses: https://github.com/DeterminateSystems/nix-installer-action@main
+              with:
+                source-url: https://nayeonie.com/ahuston-0/determinate-nix-mirror/releases/download/${{ steps.latest-installer.outputs.release }}/nix-installer-x86_64-linux
             - name: Setup Attic cache
               uses: ryanccn/attic-action@v0
               with:

.github/workflows/nix-fmt.yml

@@ -10,7 +10,15 @@ jobs:
         name: "Perform Nix format checks"
         runs-on: ubuntu-latest
         steps:
-            - uses: DeterminateSystems/nix-installer-action@main
+            - name: Get Latest Determinate Nix Installer binary
+              id: latest-installer
+              uses: sigyl-actions/gitea-action-get-latest-release@main
+              with:
+                repository: ahuston-0/determinate-nix-mirror
+            - name: Install nix
+              uses: https://github.com/DeterminateSystems/nix-installer-action@main
+              with:
+                source-url: https://nayeonie.com/ahuston-0/determinate-nix-mirror/releases/download/${{ steps.latest-installer.outputs.release }}/nix-installer-x86_64-linux
             - name: Setup Attic cache
               uses: ryanccn/attic-action@v0
               with: