diff --git a/ci/bin/format.dart b/ci/bin/format.dart
index e68e046533c6f..9f6674c1ef69a 100644
--- a/ci/bin/format.dart
+++ b/ci/bin/format.dart
@@ -304,14 +304,19 @@ abstract class FormatChecker {
 /// Checks and formats C++/ObjC/Shader files using clang-format.
 class ClangFormatChecker extends FormatChecker {
   ClangFormatChecker({
-    super.processManager,
-    required super.baseGitRef,
-    required super.repoDir,
+    ProcessManager processManager = const LocalProcessManager(),
+    required String baseGitRef,
+    required Directory repoDir,
     required Directory srcDir,
-    super.allFiles,
-    super.messageCallback,
+    bool allFiles = false,
+    MessageCallback? messageCallback,
   }) : super(
+          processManager: processManager,
+          baseGitRef: baseGitRef,
+          repoDir: repoDir,
           srcDir: srcDir,
+          allFiles: allFiles,
+          messageCallback: messageCallback,
         ) {
     /*late*/ String clangOs;
     if (Platform.isLinux) {
@@ -444,14 +449,19 @@ class ClangFormatChecker extends FormatChecker {
 /// Checks the format of Java files uing the Google Java format checker.
 class JavaFormatChecker extends FormatChecker {
   JavaFormatChecker({
-    super.processManager,
-    required super.baseGitRef,
-    required super.repoDir,
+    ProcessManager processManager = const LocalProcessManager(),
+    required String baseGitRef,
+    required Directory repoDir,
     required Directory srcDir,
-    super.allFiles,
-    super.messageCallback,
+    bool allFiles = false,
+    MessageCallback? messageCallback,
   }) : super(
+          processManager: processManager,
+          baseGitRef: baseGitRef,
+          repoDir: repoDir,
           srcDir: srcDir,
+          allFiles: allFiles,
+          messageCallback: messageCallback,
         ) {
     googleJavaFormatJar = File(
       path.absolute(
@@ -586,14 +596,19 @@ class JavaFormatChecker extends FormatChecker {
 /// Checks the format of any BUILD.gn files using the "gn format" command.
 class GnFormatChecker extends FormatChecker {
   GnFormatChecker({
-    super.processManager,
-    required super.baseGitRef,
+    ProcessManager processManager = const LocalProcessManager(),
+    required String baseGitRef,
     required Directory repoDir,
-    required super.srcDir,
-    super.allFiles,
-    super.messageCallback,
+    required Directory srcDir,
+    bool allFiles = false,
+    MessageCallback? messageCallback,
   }) : super(
+          processManager: processManager,
+          baseGitRef: baseGitRef,
           repoDir: repoDir,
+          srcDir: srcDir,
+          allFiles: allFiles,
+          messageCallback: messageCallback,
         ) {
     gnBinary = File(
       path.join(
@@ -672,14 +687,19 @@ class GnFormatChecker extends FormatChecker {
 /// Checks the format of any .py files using the "yapf" command.
 class PythonFormatChecker extends FormatChecker {
   PythonFormatChecker({
-    super.processManager,
-    required super.baseGitRef,
+    ProcessManager processManager = const LocalProcessManager(),
+    required String baseGitRef,
     required Directory repoDir,
-    required super.srcDir,
-    super.allFiles,
-    super.messageCallback,
+    required Directory srcDir,
+    bool allFiles = false,
+    MessageCallback? messageCallback,
   }) : super(
+          processManager: processManager,
+          baseGitRef: baseGitRef,
           repoDir: repoDir,
+          srcDir: srcDir,
+          allFiles: allFiles,
+          messageCallback: messageCallback,
         ) {
     yapfBin = File(path.join(
       repoDir.absolute.path,
@@ -767,13 +787,20 @@ class _GrepResult {
 /// Checks for trailing whitspace in Dart files.
 class WhitespaceFormatChecker extends FormatChecker {
   WhitespaceFormatChecker({
-    super.processManager,
-    required super.baseGitRef,
-    required super.repoDir,
-    required super.srcDir,
-    super.allFiles,
-    super.messageCallback,
-  });
+    ProcessManager processManager = const LocalProcessManager(),
+    required String baseGitRef,
+    required Directory repoDir,
+    required Directory srcDir,
+    bool allFiles = false,
+    MessageCallback? messageCallback,
+  }) : super(
+          processManager: processManager,
+          baseGitRef: baseGitRef,
+          repoDir: repoDir,
+          srcDir: srcDir,
+          allFiles: allFiles,
+          messageCallback: messageCallback,
+        );
 
   @override
   Future<bool> checkFormatting() async {
diff --git a/ci/pubspec.yaml b/ci/pubspec.yaml
index 6b09e88641e9c..11583566998d5 100644
--- a/ci/pubspec.yaml
+++ b/ci/pubspec.yaml
@@ -5,7 +5,7 @@
 name: ci_scripts
 publish_to: none
 environment:
-  sdk: '>=3.0.0-0 <4.0.0'
+  sdk: '>=2.12.0-0 <3.0.0'
 
 # Do not add any dependencies that require more than what is provided in
 # //third_party/pkg, //third_party/dart/pkg, or
diff --git a/flutter_frontend_server/pubspec.yaml b/flutter_frontend_server/pubspec.yaml
index 48ed1a4928a18..b492661d4804b 100644
--- a/flutter_frontend_server/pubspec.yaml
+++ b/flutter_frontend_server/pubspec.yaml
@@ -18,7 +18,7 @@ homepage: https://flutter.dev
 # relative to this directory into //third_party/dart
 
 environment:
-  sdk: '>=3.0.0-0 <4.0.0'
+  sdk: ">=2.12.0 <3.0.0"
 
 dependencies:
   args: any
diff --git a/impeller/tessellator/dart/pubspec.yaml b/impeller/tessellator/dart/pubspec.yaml
index fc17320855790..4f09e8272da5c 100644
--- a/impeller/tessellator/dart/pubspec.yaml
+++ b/impeller/tessellator/dart/pubspec.yaml
@@ -8,4 +8,4 @@ publish_to: none
 homepage: https://github.com/flutter/impeller/tree/main/tessellator/dart
 
 environment:
-  sdk: '>=3.0.0-0 <4.0.0'
+  sdk: '>=2.12.0 <3.0.0'
diff --git a/lib/snapshot/pubspec.yaml b/lib/snapshot/pubspec.yaml
index bb7cd30be46ca..f9aaabf880163 100644
--- a/lib/snapshot/pubspec.yaml
+++ b/lib/snapshot/pubspec.yaml
@@ -5,4 +5,4 @@
 # This file is needed by Fuchsia's dart_library template.
 
 environment:
-  sdk: '>=3.0.0-0 <4.0.0'
+  sdk: '>=2.12.0 <3.0.0'
diff --git a/lib/web_ui/pubspec.yaml b/lib/web_ui/pubspec.yaml
index eb402787515dd..3f688e4af962a 100644
--- a/lib/web_ui/pubspec.yaml
+++ b/lib/web_ui/pubspec.yaml
@@ -3,7 +3,7 @@ publish_to: none
 
 # Keep the SDK version range in sync with pubspecs under web_sdk
 environment:
-  sdk: '>=2.19.0 <4.0.0'
+  sdk: ">=2.19.0 <3.0.0"
 
 dependencies:
   js: 0.6.4
diff --git a/shell/platform/fuchsia/dart-pkg/fuchsia/pubspec.yaml b/shell/platform/fuchsia/dart-pkg/fuchsia/pubspec.yaml
index 16fe4cdd83d71..b6f4924b50621 100644
--- a/shell/platform/fuchsia/dart-pkg/fuchsia/pubspec.yaml
+++ b/shell/platform/fuchsia/dart-pkg/fuchsia/pubspec.yaml
@@ -3,4 +3,4 @@
 # found in the LICENSE file.
 
 environment:
-  sdk: '>=3.0.0-0 <4.0.0'
+  sdk: '>=2.12.0 <3.0.0'
diff --git a/shell/platform/fuchsia/dart-pkg/zircon/pubspec.yaml b/shell/platform/fuchsia/dart-pkg/zircon/pubspec.yaml
index 121b528580c14..d82a3ccf9e8b4 100644
--- a/shell/platform/fuchsia/dart-pkg/zircon/pubspec.yaml
+++ b/shell/platform/fuchsia/dart-pkg/zircon/pubspec.yaml
@@ -5,7 +5,7 @@
 name: zircon
 
 environment:
-  sdk: '>=3.0.0-0 <4.0.0'
+  sdk: '>=2.12.0 <3.0.0'
 
 
 # Uncomment block for local testing
diff --git a/shell/platform/fuchsia/dart-pkg/zircon_ffi/pubspec.yaml b/shell/platform/fuchsia/dart-pkg/zircon_ffi/pubspec.yaml
index 5e3507cef3c23..51113aa82fdd2 100644
--- a/shell/platform/fuchsia/dart-pkg/zircon_ffi/pubspec.yaml
+++ b/shell/platform/fuchsia/dart-pkg/zircon_ffi/pubspec.yaml
@@ -1,7 +1,7 @@
 name: zircon_ffi
 
 environment:
-  sdk: '>=3.0.0-0 <4.0.0'
+  sdk: '>=2.12.0 <3.0.0'
 
 dependencies:
   ffi: ^1.0.0
diff --git a/shell/platform/fuchsia/dart_runner/embedder/pubspec.yaml b/shell/platform/fuchsia/dart_runner/embedder/pubspec.yaml
index 0bda0be6f7c95..95d02521eaa7c 100644
--- a/shell/platform/fuchsia/dart_runner/embedder/pubspec.yaml
+++ b/shell/platform/fuchsia/dart_runner/embedder/pubspec.yaml
@@ -6,5 +6,5 @@
 # template in BUILD.gn.
 
 environment:
-  sdk: '>=3.0.0-0 <4.0.0'
+  sdk: '>=2.12.0 <3.0.0'
 
diff --git a/shell/platform/fuchsia/dart_runner/vmservice/pubspec.yaml b/shell/platform/fuchsia/dart_runner/vmservice/pubspec.yaml
index 09da15ac00b35..d0e8360c33486 100644
--- a/shell/platform/fuchsia/dart_runner/vmservice/pubspec.yaml
+++ b/shell/platform/fuchsia/dart_runner/vmservice/pubspec.yaml
@@ -3,5 +3,5 @@
 # found in the LICENSE file.
 
 environment:
-  sdk: '>=3.0.0-0 <4.0.0'
+  sdk: '>=2.12.0 <3.0.0'
 
diff --git a/shell/platform/fuchsia/flutter/kernel/pubspec.yaml b/shell/platform/fuchsia/flutter/kernel/pubspec.yaml
index 16fe4cdd83d71..b6f4924b50621 100644
--- a/shell/platform/fuchsia/flutter/kernel/pubspec.yaml
+++ b/shell/platform/fuchsia/flutter/kernel/pubspec.yaml
@@ -3,4 +3,4 @@
 # found in the LICENSE file.
 
 environment:
-  sdk: '>=3.0.0-0 <4.0.0'
+  sdk: '>=2.12.0 <3.0.0'
diff --git a/shell/platform/fuchsia/flutter/tests/integration/embedder/child-view/pubspec.yaml b/shell/platform/fuchsia/flutter/tests/integration/embedder/child-view/pubspec.yaml
index fc1d582237cd2..a50988f1a4baf 100644
--- a/shell/platform/fuchsia/flutter/tests/integration/embedder/child-view/pubspec.yaml
+++ b/shell/platform/fuchsia/flutter/tests/integration/embedder/child-view/pubspec.yaml
@@ -5,4 +5,4 @@
 name: child_view2
 
 environment:
-  sdk: '>=3.0.0-0 <4.0.0'
+  sdk: '>=2.12.0 <3.0.0'
diff --git a/shell/platform/fuchsia/flutter/tests/integration/embedder/parent-view/pubspec.yaml b/shell/platform/fuchsia/flutter/tests/integration/embedder/parent-view/pubspec.yaml
index 201cf3fa56906..151abb7e2d131 100644
--- a/shell/platform/fuchsia/flutter/tests/integration/embedder/parent-view/pubspec.yaml
+++ b/shell/platform/fuchsia/flutter/tests/integration/embedder/parent-view/pubspec.yaml
@@ -5,4 +5,4 @@
 name: parent-view2
 
 environment:
-  sdk: '>=3.0.0-0 <4.0.0'
+  sdk: '>=2.18.0 <3.0.0'
diff --git a/shell/platform/fuchsia/flutter/tests/integration/mouse-input/mouse-input-view/pubspec.yaml b/shell/platform/fuchsia/flutter/tests/integration/mouse-input/mouse-input-view/pubspec.yaml
index c3196484ca75f..a557dbe433abd 100644
--- a/shell/platform/fuchsia/flutter/tests/integration/mouse-input/mouse-input-view/pubspec.yaml
+++ b/shell/platform/fuchsia/flutter/tests/integration/mouse-input/mouse-input-view/pubspec.yaml
@@ -5,4 +5,4 @@
 name: mouse-input-view
 
 environment:
-  sdk: '>=3.0.0-0 <4.0.0'
+  sdk: '>=2.18.0 <3.0.0'
diff --git a/shell/platform/fuchsia/flutter/tests/integration/text-input/text-input-view/pubspec.yaml b/shell/platform/fuchsia/flutter/tests/integration/text-input/text-input-view/pubspec.yaml
index f15d93799943b..30c6e7096ef8c 100644
--- a/shell/platform/fuchsia/flutter/tests/integration/text-input/text-input-view/pubspec.yaml
+++ b/shell/platform/fuchsia/flutter/tests/integration/text-input/text-input-view/pubspec.yaml
@@ -5,4 +5,4 @@
 name: text-input-view
 
 environment:
-  sdk: '>=3.0.0-0 <4.0.0'
+  sdk: '>=2.18.0 <3.0.0'
diff --git a/shell/platform/fuchsia/flutter/tests/integration/touch-input/embedding-flutter-view/pubspec.yaml b/shell/platform/fuchsia/flutter/tests/integration/touch-input/embedding-flutter-view/pubspec.yaml
index 5051384ec5bea..fcd78ccdc8d9a 100644
--- a/shell/platform/fuchsia/flutter/tests/integration/touch-input/embedding-flutter-view/pubspec.yaml
+++ b/shell/platform/fuchsia/flutter/tests/integration/touch-input/embedding-flutter-view/pubspec.yaml
@@ -5,4 +5,4 @@
 name: embedding-flutter-view
 
 environment:
-  sdk: '>=3.0.0-0 <4.0.0'
+  sdk: '>=2.18.0 <3.0.0'
diff --git a/shell/platform/fuchsia/flutter/tests/integration/touch-input/touch-input-view/pubspec.yaml b/shell/platform/fuchsia/flutter/tests/integration/touch-input/touch-input-view/pubspec.yaml
index 3e8e25f294cbf..cc78c78f090eb 100644
--- a/shell/platform/fuchsia/flutter/tests/integration/touch-input/touch-input-view/pubspec.yaml
+++ b/shell/platform/fuchsia/flutter/tests/integration/touch-input/touch-input-view/pubspec.yaml
@@ -5,4 +5,4 @@
 name: touch-input-view
 
 environment:
-  sdk: '>=3.0.0-0 <4.0.0'
+  sdk: '>=2.18.0 <3.0.0'
diff --git a/shell/platform/fuchsia/runtime/dart/profiler_symbols/pubspec.yaml b/shell/platform/fuchsia/runtime/dart/profiler_symbols/pubspec.yaml
index 519e6f49fd1a5..56bddf8c6277a 100644
--- a/shell/platform/fuchsia/runtime/dart/profiler_symbols/pubspec.yaml
+++ b/shell/platform/fuchsia/runtime/dart/profiler_symbols/pubspec.yaml
@@ -4,7 +4,7 @@
 
 name: profiler_symbols
 environment:
-  sdk: '>=3.0.0-0 <4.0.0'
+  sdk: '>=2.12.0 <3.0.0'
 version: 0
 description: Extracts a minimal symbols table for the Dart VM profiler
 author: Dart Team <misc@dartlang.org>
diff --git a/shell/vmservice/pubspec.yaml b/shell/vmservice/pubspec.yaml
index d8061c2f61dbb..7c1f613b34059 100644
--- a/shell/vmservice/pubspec.yaml
+++ b/shell/vmservice/pubspec.yaml
@@ -5,4 +5,4 @@
 name: vmservice_snapshot
 publish_to: none
 environment:
-  sdk: '>=3.0.0-0 <4.0.0'
+  sdk: '>=2.12.0 <3.0.0'
diff --git a/sky/packages/sky_engine/pubspec.yaml b/sky/packages/sky_engine/pubspec.yaml
index c613749d4bbc5..9d357357db336 100644
--- a/sky/packages/sky_engine/pubspec.yaml
+++ b/sky/packages/sky_engine/pubspec.yaml
@@ -5,4 +5,4 @@ description: Dart SDK extensions for dart:ui
 homepage: http://flutter.io
 # sky_engine requires sdk_ext support in the analyzer which was added in 1.11.x
 environment:
-  sdk: '>=3.0.0-0 <4.0.0'
+  sdk: ">=2.12.0-0 <3.0.0"
diff --git a/testing/android_background_image/pubspec.yaml b/testing/android_background_image/pubspec.yaml
index 82a37fd9f4831..361922d8fd21f 100644
--- a/testing/android_background_image/pubspec.yaml
+++ b/testing/android_background_image/pubspec.yaml
@@ -5,7 +5,7 @@
 name: android_background_image
 publish_to: none
 environment:
-  sdk: '>=3.0.0-0 <4.0.0'
+  sdk: '>=2.12.0 <3.0.0'
 
 # Do not add any dependencies that require more than what is provided in
 # //third_party/dart/pkg, //third_party/dart/third_party/pkg, or
diff --git a/testing/benchmark/pubspec.yaml b/testing/benchmark/pubspec.yaml
index dc860ed38d7ca..9aa5acda38916 100644
--- a/testing/benchmark/pubspec.yaml
+++ b/testing/benchmark/pubspec.yaml
@@ -5,7 +5,7 @@
 name: flutter_engine_benchmark
 publish_to: none
 environment:
-  sdk: '>=3.0.0-0 <4.0.0'
+  sdk: '>=2.12.0-0 <3.0.0'
 
 # Do not add any dependencies that require more than what is provided in
 # //third_party/pkg, //third_party/dart/pkg, or
diff --git a/testing/dart/pubspec.yaml b/testing/dart/pubspec.yaml
index c2f4df9744cde..cebfd589104ab 100644
--- a/testing/dart/pubspec.yaml
+++ b/testing/dart/pubspec.yaml
@@ -14,7 +14,7 @@ publish_to: none
 # relative to this directory into //third_party/dart
 
 environment:
-  sdk: '>=3.0.0-0 <4.0.0'
+  sdk: '>=2.17.0 <3.0.0'
 
 dependencies:
   litetest: any
diff --git a/testing/litetest/pubspec.yaml b/testing/litetest/pubspec.yaml
index 392ce6411fcd7..905a4999a9d30 100644
--- a/testing/litetest/pubspec.yaml
+++ b/testing/litetest/pubspec.yaml
@@ -14,7 +14,7 @@ publish_to: none
 # relative to this directory into //third_party/dart
 
 environment:
-  sdk: '>=3.0.0-0 <4.0.0'
+  sdk: '>=2.12.0 <3.0.0'
 
 dependencies:
   async_helper: any
diff --git a/testing/scenario_app/pubspec.yaml b/testing/scenario_app/pubspec.yaml
index c90a33d7f3204..696d3871584ad 100644
--- a/testing/scenario_app/pubspec.yaml
+++ b/testing/scenario_app/pubspec.yaml
@@ -5,7 +5,7 @@
 name: scenario_app
 publish_to: none
 environment:
-  sdk: '>=3.0.0-0 <4.0.0'
+  sdk: '>=2.17.0 <3.0.0'
 
 # Do not add any dependencies that require more than what is provided in
 # //third_party/dart/pkg, //third_party/dart/third_party/pkg, or
diff --git a/testing/skia_gold_client/pubspec.yaml b/testing/skia_gold_client/pubspec.yaml
index 9f39ae9b2806e..bd6d3082d7c2d 100644
--- a/testing/skia_gold_client/pubspec.yaml
+++ b/testing/skia_gold_client/pubspec.yaml
@@ -5,7 +5,7 @@
 name: skia_gold_client
 publish_to: none
 environment:
-  sdk: '>=3.0.0-0 <4.0.0'
+  sdk: '>=2.12.0 <3.0.0'
 
 # Do not add any dependencies that require more than what is provided in
 # //third_party/dart/pkg, //third_party/dart/third_party/pkg, or
diff --git a/testing/smoke_test_failure/pubspec.yaml b/testing/smoke_test_failure/pubspec.yaml
index df2f11055e778..c51c8cecbe7e8 100644
--- a/testing/smoke_test_failure/pubspec.yaml
+++ b/testing/smoke_test_failure/pubspec.yaml
@@ -5,7 +5,7 @@
 name: smoke_test_failure
 publish_to: none
 environment:
-  sdk: '>=3.0.0-0 <4.0.0'
+  sdk: '>=2.12.0 <3.0.0'
 
 # Do not add any dependencies that require more than what is provided in
 # //third_party/dart/pkg or //third_party/dart/third_party/pkg.
diff --git a/testing/symbols/pubspec.yaml b/testing/symbols/pubspec.yaml
index ab9d4b49a8d67..6f78767c10912 100644
--- a/testing/symbols/pubspec.yaml
+++ b/testing/symbols/pubspec.yaml
@@ -5,7 +5,7 @@
 name: verify_exported
 publish_to: none
 environment:
-  sdk: '>=3.0.0-0 <4.0.0'
+  sdk: '>=2.12.0 <3.0.0'
 
 # Do not add any dependencies that require more than what is provided in
 # //third_party/pkg, //third_party/dart/pkg, or
diff --git a/third_party/web_locale_keymap/pubspec.yaml b/third_party/web_locale_keymap/pubspec.yaml
index 2da80a46c5108..c9c7518d01ed1 100644
--- a/third_party/web_locale_keymap/pubspec.yaml
+++ b/third_party/web_locale_keymap/pubspec.yaml
@@ -3,7 +3,7 @@ name: web_locale_keymap
 publish_to: none
 
 environment:
-  sdk: '>=3.0.0-0 <4.0.0'
+  sdk: ">=2.12.0 <3.0.0"
 
 dev_dependencies:
   test: ^1.21.7
diff --git a/third_party/web_test_fonts/pubspec.yaml b/third_party/web_test_fonts/pubspec.yaml
index 6c2af49caa236..427accd1f6a67 100644
--- a/third_party/web_test_fonts/pubspec.yaml
+++ b/third_party/web_test_fonts/pubspec.yaml
@@ -3,7 +3,7 @@ name: web_test_fonts
 publish_to: none
 
 environment:
-  sdk: '>=3.0.0-0 <4.0.0'
+  sdk: ">=2.12.0-0 <3.0.0"
 
 dev_dependencies:
   args: any
diff --git a/third_party/web_unicode/pubspec.yaml b/third_party/web_unicode/pubspec.yaml
index 99b6d98c56688..8d9281ee95302 100644
--- a/third_party/web_unicode/pubspec.yaml
+++ b/third_party/web_unicode/pubspec.yaml
@@ -3,7 +3,7 @@ name: web_unicode
 publish_to: none
 
 environment:
-  sdk: '>=3.0.0-0 <4.0.0'
+  sdk: ">=2.12.0-0 <3.0.0"
 
 dev_dependencies:
   args: any
diff --git a/tools/android_lint/pubspec.yaml b/tools/android_lint/pubspec.yaml
index 4c62944ea4617..81eb92b208841 100644
--- a/tools/android_lint/pubspec.yaml
+++ b/tools/android_lint/pubspec.yaml
@@ -4,7 +4,7 @@
 
 name: android_lint
 environment:
-  sdk: '>=3.0.0-0 <4.0.0'
+  sdk: '>=2.12.0 <3.0.0'
 
 # Do not add any dependencies that require more than what is provided in
 # //third_party.pkg, //third_party/dart/pkg, or
diff --git a/tools/api_check/pubspec.yaml b/tools/api_check/pubspec.yaml
index 1457897656329..60a1493a0247a 100644
--- a/tools/api_check/pubspec.yaml
+++ b/tools/api_check/pubspec.yaml
@@ -14,7 +14,7 @@ publish_to: none
 # relative to this directory into //third_party/dart
 
 environment:
-  sdk: '>=3.0.0-0 <4.0.0'
+  sdk: '>=2.12.0 <3.0.0'
 
 # Do not add any dependencies that require more than what is provided in
 # //third_party/pkg, //third_party/dart/pkg, or
diff --git a/tools/clang_tidy/pubspec.yaml b/tools/clang_tidy/pubspec.yaml
index 46befe2929db6..7e89c33285ceb 100644
--- a/tools/clang_tidy/pubspec.yaml
+++ b/tools/clang_tidy/pubspec.yaml
@@ -5,7 +5,7 @@
 name: clang_tidy
 publish_to: none
 environment:
-  sdk: '>=3.0.0-0 <4.0.0'
+  sdk: '>=2.12.0-0 <3.0.0'
 
 # Do not add any dependencies that require more than what is provided in
 # //third_party/pkg, //third_party/dart/pkg, or
diff --git a/tools/const_finder/pubspec.yaml b/tools/const_finder/pubspec.yaml
index b174754fff0df..9e4804c8aa400 100644
--- a/tools/const_finder/pubspec.yaml
+++ b/tools/const_finder/pubspec.yaml
@@ -6,7 +6,7 @@ name: const_finder
 publish_to: none
 
 environment:
-  sdk: '>=3.0.0-0 <4.0.0'
+  sdk: ">=2.17.0 <4.0.0"
 
 # Do not add any dependencies that require more than what is provided in
 # //third_party/dart/pkg or //third_party/dart/third_party/pkg.
diff --git a/tools/gen_web_locale_keymap/pubspec.yaml b/tools/gen_web_locale_keymap/pubspec.yaml
index e7987d6338aec..a1c1f055ccd1b 100644
--- a/tools/gen_web_locale_keymap/pubspec.yaml
+++ b/tools/gen_web_locale_keymap/pubspec.yaml
@@ -2,7 +2,7 @@ name: gen_web_keyboard_keymap
 description: Generates keyboard layouts for Web from external sources.
 
 environment:
-  sdk: '>=3.0.0-0 <4.0.0'
+  sdk: ">=2.18.0-0 <3.0.0"
 
 dependencies:
   args: any
diff --git a/tools/githooks/pubspec.yaml b/tools/githooks/pubspec.yaml
index 6b5bb5c2340a7..891f45852b1b8 100644
--- a/tools/githooks/pubspec.yaml
+++ b/tools/githooks/pubspec.yaml
@@ -5,7 +5,7 @@
 name: githooks
 publish_to: none
 environment:
-  sdk: '>=3.0.0-0 <4.0.0'
+  sdk: '>=2.12.0-0.0.dev <3.0.0'
 
 # Do not add any dependencies that require more than what is provided in
 # //third_party.pkg, //third_party/dart/pkg, or
diff --git a/tools/licenses/pubspec.yaml b/tools/licenses/pubspec.yaml
index 85f69a2bad58b..71e93ce5ed377 100644
--- a/tools/licenses/pubspec.yaml
+++ b/tools/licenses/pubspec.yaml
@@ -5,7 +5,7 @@
 name: licenses
 publish_to: none
 environment:
-  sdk: '>=3.0.0-0 <4.0.0'
+  sdk: '>=2.18.0 <3.0.0'
 
 # Do not add any dependencies that require more than what is provided
 # in //third_party.pkg, //third_party/dart/pkg, or
diff --git a/tools/path_ops/dart/pubspec.yaml b/tools/path_ops/dart/pubspec.yaml
index db4d16542f5f1..2db190830779d 100644
--- a/tools/path_ops/dart/pubspec.yaml
+++ b/tools/path_ops/dart/pubspec.yaml
@@ -8,7 +8,7 @@ publish_to: none
 homepage: https://github.com/flutter/engine/tree/main/tools/path_ops
 
 environment:
-  sdk: '>=3.0.0-0 <4.0.0'
+  sdk: '>=2.17.0 <3.0.0'
 
 dev_dependencies:
   litetest: any
diff --git a/web_sdk/pubspec.yaml b/web_sdk/pubspec.yaml
index d452fbe0a4db6..c97581317f1ef 100644
--- a/web_sdk/pubspec.yaml
+++ b/web_sdk/pubspec.yaml
@@ -2,7 +2,7 @@ name: web_sdk_tests
 
 # Keep the SDK version range in sync with lib/web_ui/pubspec.yaml
 environment:
-  sdk: '>=2.19.0 <4.0.0'
+  sdk: ">=2.19.0 <3.0.0"
 
 dependencies:
   args: 2.3.1
diff --git a/web_sdk/web_engine_tester/pubspec.yaml b/web_sdk/web_engine_tester/pubspec.yaml
index 06ab52b319740..820ad1629eb7c 100644
--- a/web_sdk/web_engine_tester/pubspec.yaml
+++ b/web_sdk/web_engine_tester/pubspec.yaml
@@ -2,7 +2,7 @@ name: web_engine_tester
 
 # Keep the SDK version range in sync with lib/web_ui/pubspec.yaml
 environment:
-  sdk: '>=3.0.0-0 <4.0.0'
+  sdk: ">=2.12.0-0 <3.0.0"
 
 dependencies:
   js: 0.6.4
diff --git a/web_sdk/web_test_utils/pubspec.yaml b/web_sdk/web_test_utils/pubspec.yaml
index c9b8530271a9a..03aac1e7e629a 100644
--- a/web_sdk/web_test_utils/pubspec.yaml
+++ b/web_sdk/web_test_utils/pubspec.yaml
@@ -2,7 +2,7 @@ name: web_test_utils
 
 # Keep the SDK version range in sync with lib/web_ui/pubspec.yaml
 environment:
-  sdk: '>=3.0.0-0 <4.0.0'
+  sdk: ">=2.12.0-0 <3.0.0"
 
 dependencies:
   collection: 1.15.0