diff --git a/.github/workflows/build-machines-and-homes.yml b/.github/workflows/build-machines-and-homes.yml
index 741aa70..4e45c05 100644
--- a/.github/workflows/build-machines-and-homes.yml
+++ b/.github/workflows/build-machines-and-homes.yml
@@ -42,6 +42,23 @@ jobs:
         uses: actions/checkout@v4
         with:
           persist-credentials: false
+      - name: Restore and cache Nix store
+        uses: nix-community/cache-nix-action@v5.1.0
+        with:
+          # restore and save a cache using this key
+          primary-key: nix-${{ runner.os }}-${{ matrix.machine }}-${{ hashFiles('**/*.nix', 'flake.lock') }}
+          # if there's no cache hit, restore a cache by this prefix
+          restore-prefixes-first-match: nix-${{ runner.os }}-${{ matrix.machine }}-
+          # do purge caches
+          purge: true
+          # purge all versions of the cache
+          purge-prefixes: nix-${{ runner.os }}-
+          # created more than this number of seconds ago relative to the start of the `Post Restore` phase
+          purge-last-accessed: 86400
+          # except the version with the `primary-key`, if it exists
+          purge-primary-key: never
+          # always save the cache
+          save-always: true
       - name: setup attic
         run: |
           nix profile install github:zhaofengli/attic
@@ -85,6 +102,23 @@ jobs:
         uses: actions/checkout@v4
         with:
           persist-credentials: false
+      - name: Restore and cache Nix store
+        uses: nix-community/cache-nix-action@v5.1.0
+        with:
+          # restore and save a cache using this key
+          primary-key: nix-${{ runner.os }}-${{ matrix.home }}-${{ hashFiles('**/*.nix', 'flake.lock') }}
+          # if there's no cache hit, restore a cache by this prefix
+          restore-prefixes-first-match: nix-${{ runner.os }}-${{ matrix.home }}-
+          # do purge caches
+          purge: true
+          # purge all versions of the cache
+          purge-prefixes: nix-${{ runner.os }}-
+          # created more than this number of seconds ago relative to the start of the `Post Restore` phase
+          purge-last-accessed: 86400
+          # except the version with the `primary-key`, if it exists
+          purge-primary-key: never
+          # always save the cache
+          save-always: true
       - name: setup attic
         run: |
           nix profile install github:zhaofengli/attic
diff --git a/flake.nix b/flake.nix
index 63877d3..024c157 100644
--- a/flake.nix
+++ b/flake.nix
@@ -160,7 +160,7 @@
               config.allowUnfree = true;
               system = "x86_64-linux";
               overlays = [
-                inputs.lix-module.overlays.default
+                inputs.lix-modules.overlays.default
                 inputs.rust-overlay.overlays.default
                 inputs.vscode-extensions.overlays.default
               ] ++ (import ./overlay { inherit inputs; });