diff --git a/.github/actions/yarn/action.yml b/.github/actions/yarn/action.yml
index cd88040e6..ee50ad6da 100644
--- a/.github/actions/yarn/action.yml
+++ b/.github/actions/yarn/action.yml
@@ -1,22 +1,34 @@
 name: Yarn
 description: Sets up the Yarn, the Yarn Cache, and installs
 
+inputs:
+  cachix-auth-token:
+    required: true
+    description: "Your Cachix auth token."
+
 runs:
   using: composite
   steps:
-    - uses: actions/setup-node@v2
+    # Install Cachix
+    - uses: cachix/install-nix-action@v17
+    - name: Setup Cachix
+      uses: cachix/cachix-action@v10
       with:
-        node-version: "14"
+        name: saber
+        authToken: ${{ inputs.cachix-auth-token }}
+
+    # Install Node
+    - uses: actions/setup-node@v3
     - name: Get yarn cache directory path
       id: yarn-cache-dir-path
       run: echo "::set-output name=dir::$(yarn config get cacheFolder)"
-      shell: bash
+      shell: nix shell .#ci --command bash {0}
     - name: Yarn Cache
-      uses: actions/cache@v2
+      uses: actions/cache@v3
       with:
         path: ${{ steps.yarn-cache-dir-path.outputs.dir }}
         key: ${{ runner.os }}-modules-${{ hashFiles('**/yarn.lock') }}
         restore-keys: |
           ${{ runner.os }}-modules-
     - run: yarn install
-      shell: bash
+      shell: nix shell .#ci --command bash {0}
diff --git a/.github/workflows/main.yml b/.github/workflows/main.yml
index fe73c6379..7e0958027 100644
--- a/.github/workflows/main.yml
+++ b/.github/workflows/main.yml
@@ -6,12 +6,18 @@ on:
   pull_request:
     branches: [master]
 
+defaults:
+  run:
+    shell: nix shell .#ci --command bash {0}
+
 jobs:
   build:
     runs-on: ubuntu-latest
     steps:
       - uses: actions/checkout@v3
       - uses: ./.github/actions/yarn
+        with:
+          cachix-auth-token: ${{ secrets.CACHIX_AUTH_TOKEN }}
       - run: yarn build
       - run: yarn size
 
@@ -20,6 +26,8 @@ jobs:
     steps:
       - uses: actions/checkout@v3
       - uses: ./.github/actions/yarn
+        with:
+          cachix-auth-token: ${{ secrets.CACHIX_AUTH_TOKEN }}
       - run: yarn build
       - run: yarn typecheck
 
@@ -28,6 +36,8 @@ jobs:
     steps:
       - uses: actions/checkout@v3
       - uses: ./.github/actions/yarn
+        with:
+          cachix-auth-token: ${{ secrets.CACHIX_AUTH_TOKEN }}
       - run: yarn build
       - run: yarn test
 
@@ -36,6 +46,8 @@ jobs:
     steps:
       - uses: actions/checkout@v3
       - uses: ./.github/actions/yarn
+        with:
+          cachix-auth-token: ${{ secrets.CACHIX_AUTH_TOKEN }}
       - run: yarn build
       - run: yarn lint:ci
 
@@ -44,6 +56,8 @@ jobs:
     steps:
       - uses: actions/checkout@v3
       - uses: ./.github/actions/yarn
+        with:
+          cachix-auth-token: ${{ secrets.CACHIX_AUTH_TOKEN }}
       # workaround b/c it's broken
       - run: yarn plugin remove @yarnpkg/plugin-version
       - run: yarn doctor packages/
diff --git a/flake.nix b/flake.nix
index 9e74b83b1..3f932ad89 100644
--- a/flake.nix
+++ b/flake.nix
@@ -14,7 +14,7 @@
         rec {
           packages.ci = pkgs.buildEnv {
             name = "ci";
-            paths = with pkgs; [ nodejs yarn nixpkgs-fmt ];
+            paths = with pkgs; [ nodejs yarn nixpkgs-fmt bash ];
           };
           devShell = pkgs.mkShell { buildInputs = [ packages.ci ]; };
         });
diff --git a/package.json b/package.json
index 1735d9297..8db39ba92 100644
--- a/package.json
+++ b/package.json
@@ -8,8 +8,8 @@
   ],
   "lint-staged": {
     "*.nix": "nixpkgs-fmt",
-    "*.{ts,tsx}": "eslint --cache --fix",
-    "*.{md,js,json,yml,yaml,css,md}": "prettier --write"
+    "*.{ts,tsx,mts,cts}": "eslint --cache --fix",
+    "*.{md,js,jsx,json,yml,yaml,css,md}": "prettier --write"
   },
   "devDependencies": {
     "@babel/core": "^7.18.2",
diff --git a/yarn.lock b/yarn.lock
index 1989f9d2d..ceea20011 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -3238,7 +3238,7 @@ __metadata:
   languageName: node
   linkType: hard
 
-"@types/react@npm:^18.0.10":
+"@types/react@npm:^18.0.10, @types/react@npm:^18.0.9":
   version: 18.0.10
   resolution: "@types/react@npm:18.0.10"
   dependencies: