fix?

.gitea/workflows/ci.yml

@@ -9,17 +9,24 @@ on:
 jobs:
   flake-check:
     name: Flake Check
-    runs-on: nix
+    runs-on: ubuntu-latest
     steps:
       - name: Checkout code
         uses: actions/checkout@v4
 
+      - name: Install Nix
+        uses: https://github.com/cachix/install-nix-action@v26
+        with:
+          extra_nix_config: |
+            experimental-features = nix-command flakes
+            accept-flake-config = true
+
       - name: Validate flake
         run: nix flake check --print-build-logs
 
   build-all:
     name: Build All Packages
-    runs-on: nix
+    runs-on: ubuntu-latest
     steps:
       - name: Checkout code
         uses: actions/checkout@v4
@@ -29,7 +36,7 @@ jobs:
 
   build-individual:
     name: Build Individual Packages
-    runs-on: nix
+    runs-on: ubuntu-latest
     strategy:
       fail-fast: false
       matrix:
@@ -45,6 +52,13 @@ jobs:
       - name: Checkout code
         uses: actions/checkout@v4
 
+      - name: Install Nix
+        uses: https://github.com/cachix/install-nix-action@v26
+        with:
+          extra_nix_config: |
+            experimental-features = nix-command flakes
+            accept-flake-config = true
+
       - name: Build ${{ matrix.package }}
         run: nix build .#${{ matrix.package }} --print-build-logs