remove wheel preference, add CI

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

@@ -0,0 +1,47 @@
+name: "Check Nix flake"
+on:
+    push:
+        branches: ["main"]
+    pull_request:
+        branches: ["main"]
+    merge_group:
+jobs:
+    health-check:
+        name: "Perform Nix flake checks"
+        runs-on: ${{ matrix.os }}
+        strategy:
+            matrix:
+                os: [ubuntu-latest]
+        steps:
+            - uses: DeterminateSystems/nix-installer-action@main
+            - name: Setup Attic cache
+              uses: ryanccn/attic-action@v0
+              with:
+                endpoint: ${{ secrets.ATTIC_ENDPOINT }}
+                cache: ${{ secrets.ATTIC_CACHE }}
+                token: ${{ secrets.ATTIC_TOKEN }}
+                skip-push: "true"
+            - uses: actions/checkout@v4
+            - run: nix flake check --accept-flake-config
+            - run: nix ./utils/attic-push.bash
+    build-checks:
+        name: "Build nix outputs"
+        runs-on: ${{ matrix.os }}
+        strategy:
+            matrix:
+                os: [ubuntu-latest]
+        steps:
+            - uses: DeterminateSystems/nix-installer-action@main
+            - name: Setup Attic cache
+              uses: ryanccn/attic-action@v0
+              with:
+                endpoint: ${{ secrets.ATTIC_ENDPOINT }}
+                cache: ${{ secrets.ATTIC_CACHE }}
+                token: ${{ secrets.ATTIC_TOKEN }}
+                skip-push: "true"
+            - uses: actions/checkout@v4
+            - name: Build all outputs
+              run: nix run git+https://nayeonie.com/ahuston-0/flake-update-diff -- --build .
+            - name: Push to Attic
+              run: nix ./utils/attic-push.bash
+              continue-on-error: true