fix attic install, use faster nix installer, rm cachix

.github/workflows/build-machines-and-homes.yml

@@ -5,6 +5,14 @@ on:
   pull_request:
 env:
   ATTIC_TOKEN: ${{ secrets.ATTIC_TOKEN }}
+  NIX_CONFIG: |
+    show-trace = true
+    extra-substituters = https://cache.cy7.sh/main
+    extra-trusted-public-keys = main:Ku31HoEWcBtfggge2VGj+QTkVrQuIwRIMGyfV/5VQP0=
+    experimental-features = nix-command flakes
+    extra-experimental-features = nix-command flakes
+    accept-flake-config = true
+    TERM: ansi
 
 jobs:
   build-machines:
@@ -29,21 +37,15 @@ jobs:
           remove-codeql: 'true'
           remove-docker-images: 'true'
           build-mount-path: /nix
+
       - name: Install Nix
-        uses: cachix/install-nix-action@v30
+        uses: nixbuild/nix-quick-install-action@master
-        with:
+
-          install_url: https://releases.nixos.org/nix/nix-2.25.4/install
-          extra_nix_config: 'accept-flake-config = true'
       - name: Sync repository
         uses: actions/checkout@v4
         with:
           persist-credentials: false
-      - uses: cachix/cachix-action@v14
+
-        with:
-          name: cything
-          authToken: '${{ secrets.CACHIX_AUTH_TOKEN }}'
-          useDaemon: false
-          installCommand: nix profile install nixpkgs#cachix
       - name: Restore and cache Nix store
         uses: nix-community/cache-nix-action@v5.1.0
         with:
@@ -64,13 +66,11 @@ jobs:
           
       - name: setup attic
         run: |
-          nix profile install nixpkgs#attic
+          nix run github:zhaofengli/attic login cy7 https://cache.cy7.sh "$ATTIC_TOKEN"
-          attic login cy7 https://cache.cy7.sh "$ATTIC_TOKEN"
-          attic use main
 
       - run: |
           nix build -L .#nixosConfigurations.${{ matrix.machine }}.config.system.build.toplevel
-          attic push main result
+          nix run github:zhaofengli/attic push main result
 
   build-homes:
     strategy:
@@ -94,17 +94,14 @@ jobs:
           remove-codeql: 'true'
           remove-docker-images: 'true'
           build-mount-path: /nix
+
       - uses: nixbuild/nix-quick-install-action@master
+
       - name: Sync repository
         uses: actions/checkout@v4
         with:
           persist-credentials: false
-      - uses: cachix/cachix-action@v14
+
-        with:
-          name: cything
-          authToken: '${{ secrets.CACHIX_AUTH_TOKEN }}'
-          useDaemon: false
-          installCommand: nix profile install nixpkgs#cachix
       - name: Restore and cache Nix store
         uses: nix-community/cache-nix-action@v5.1.0
         with:
@@ -125,10 +122,8 @@ jobs:
 
       - name: setup attic
         run: |
-          nix profile install nixpkgs#attic
+          nix run github:zhaofengli/attic login cy7 https://cache.cy7.sh "$ATTIC_TOKEN"
-          attic login cy7 https://cache.cy7.sh "$ATTIC_TOKEN"
-          attic use main
 
       - run: |
           nix build -L .#homeConfigurations."${{ matrix.home }}".activationPackage
-          attic push main result
+          nix run github:zhaofengli/attic push main result