ci: Update Nix installation and caching steps

.github/workflows/ci.yml

@@ -40,28 +40,29 @@ jobs:
     strategy:
       matrix:
         test-vector: [bitcoin-cln, bitcoin-lnd, liquid-cln, liquid-lnd, misc-integration, lwk-cln, lwk-lnd]
+      max-parallel: 12
     steps:
       - name: Checkout code
         uses: actions/checkout@v4
         with:
           fetch-depth: 0
-      - uses: nixbuild/nix-quick-install-action@v28
-      - name: Restore and cache Nix store
-        uses: nix-community/cache-nix-action@v5
+
+      - uses: cachix/install-nix-action@v31
         with:
-          # restore and save a cache using this key
-          primary-key: nix-${{ runner.os }}-${{ hashFiles('**/*.nix') }}
-          # if there's no cache hit, restore a cache by this prefix
-          restore-prefixes-first-match: nix-${{ runner.os }}-
-          # collect garbage until Nix store size (in bytes) is at most this number
-          # before trying to save a new cache
-          gc-max-store-size-linux: 1073741824
-          # do purge caches
-          purge: true
-          # purge all versions of the cache
-          purge-prefixes: cache-${{ runner.os }}-
-          # created more than this number of seconds ago relative to the start of the `Post Restore` phase
-          purge-created: 0
-          # except the version with the `primary-key`, if it exists
-          purge-primary-key: never
-      - run: nix-shell --run "make test-${{matrix.test-vector}}"
+          github_access_token: ${{ secrets.GITHUB_TOKEN }}
+          extra_nix_config: |
+            experimental-features = nix-command flakes
+
+      - uses: cachix/cachix-action@v16
+        with:
+          name: peerswap
+          authToken: '${{ secrets.CACHIX_AUTH_TOKEN }}'
+          useDaemon: true
+
+      - name: Build development shell
+        run: nix develop --profile ./dev-profile
+
+      - name: Build test binaries
+        run: nix develop -c make test-bins
+
+      - run: nix develop -c make test-${{matrix.test-vector}}