diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 433b934..5743612 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -15,12 +15,12 @@ jobs:
         node: [20, 22, 24]
     steps:
       - uses: actions/checkout@v4
+      - name: Enable corepack
+        run: corepack enable
       - uses: actions/setup-node@v4
         with:
           node-version: ${{ matrix.node }}
           cache: pnpm
-      - name: Enable corepack
-        run: corepack enable
       - run: pnpm install --frozen-lockfile
       - run: pnpm run build
       - run: node --test test.mjs
@@ -31,12 +31,12 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - uses: actions/checkout@v4
+      - name: Enable corepack
+        run: corepack enable
       - uses: actions/setup-node@v4
         with:
           node-version: 24
           cache: pnpm
-      - name: Enable corepack
-        run: corepack enable
       - run: pnpm install --frozen-lockfile
       - run: pnpm run lint
       - run: pnpm run format:check
@@ -46,12 +46,12 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - uses: actions/checkout@v4
+      - name: Enable corepack
+        run: corepack enable
       - uses: actions/setup-node@v4
         with:
           node-version: 24
           cache: pnpm
-      - name: Enable corepack
-        run: corepack enable
       - run: pnpm install --frozen-lockfile
       - run: pnpm run typecheck
 
@@ -60,12 +60,12 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - uses: actions/checkout@v4
+      - name: Enable corepack
+        run: corepack enable
       - uses: actions/setup-node@v4
         with:
           node-version: 24
           cache: pnpm
-      - name: Enable corepack
-        run: corepack enable
       - run: pnpm install --frozen-lockfile
       - run: pnpm run build
       - name: Verify pack contents
diff --git a/package.json b/package.json
index 8a1624f..c59eccb 100644
--- a/package.json
+++ b/package.json
@@ -38,7 +38,8 @@
     "format": "prettier --write src/",
     "format:check": "prettier --check src/",
     "prepublishOnly": "tsup",
-    "coverage": "c8 --reporter=lcov --reporter=text node --test"
+    "coverage": "c8 --reporter=lcov --reporter=text node --test",
+    "postbuild": "cp dist/index.d.ts dist/index.d.mts"
   },
   "keywords": [
     "dayjs",