Switch to fomat with dev
diff --git a/.github/workflows/appengine.yml b/.github/workflows/appengine.yml
index 588555d..36a3c16 100644
--- a/.github/workflows/appengine.yml
+++ b/.github/workflows/appengine.yml
@@ -40,6 +40,6 @@
 
       # Disabled - this would format ~492 files.
       # - run: dart format --output=none --set-exit-if-changed .
-      #   if: ${{ matrix.sdk == 'stable' }}
+      #   if: ${{ matrix.sdk == 'dev' }}
 
       - run: dart test
diff --git a/.github/workflows/gcloud.yml b/.github/workflows/gcloud.yml
index 1893570..5689468 100644
--- a/.github/workflows/gcloud.yml
+++ b/.github/workflows/gcloud.yml
@@ -39,6 +39,6 @@
       - run: dart analyze --fatal-infos
 
       - run: dart format --output=none --set-exit-if-changed .
-        if: ${{ matrix.sdk == 'stable' }}
+        if: ${{ matrix.sdk == 'dev' }}
 
       - run: dart test --platform vm -P ci
diff --git a/.github/workflows/jot.yml b/.github/workflows/jot.yml
index 398ca0c..3a68c5b 100644
--- a/.github/workflows/jot.yml
+++ b/.github/workflows/jot.yml
@@ -39,7 +39,7 @@
       - run: dart analyze --fatal-infos
 
       - run: dart format --output=none --set-exit-if-changed .
-        if: ${{ matrix.sdk == 'stable' }}
+        if: ${{ matrix.sdk == 'dev' }}
 
       # Ensure that the front-end is up to date.
       - run: dart tool/build_web.dart --verify
diff --git a/.github/workflows/native_synchronization.yml b/.github/workflows/native_synchronization.yml
index 48da678..b14f762 100644
--- a/.github/workflows/native_synchronization.yml
+++ b/.github/workflows/native_synchronization.yml
@@ -39,6 +39,6 @@
       - run: dart analyze --fatal-infos
 
       - run: dart format --output=none --set-exit-if-changed .
-        if: ${{ matrix.sdk == 'stable' }}
+        if: ${{ matrix.sdk == 'dev' }}
 
       - run: dart test
diff --git a/.github/workflows/timezone.yml b/.github/workflows/timezone.yml
index a51c822..b8c01d6 100644
--- a/.github/workflows/timezone.yml
+++ b/.github/workflows/timezone.yml
@@ -36,6 +36,7 @@
       - run: dart pub get
       - run: dart analyze --fatal-infos
       - run: dart format --output=none --set-exit-if-changed .
+        if: ${{ matrix.sdk == 'dev' }}
       - run: dart test
 
   document:
diff --git a/.github/workflows/unix_api.yml b/.github/workflows/unix_api.yml
index 02aee48..60d1bd5 100644
--- a/.github/workflows/unix_api.yml
+++ b/.github/workflows/unix_api.yml
@@ -27,6 +27,8 @@
     steps:
       - uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd
       - uses: dart-lang/setup-dart@65eb853c7ba17dde3be364c3d2858773e7144260
+        with:
+          sdk: dev
       - run: dart pub get
       - run: dart analyze --fatal-infos
       - run: dart format --output=none --set-exit-if-changed .