Use prerelease build packages, prepare prerelease.

Author: davidmorgan

example/pubspec.yaml

@@ -7,7 +7,7 @@ environment:
 
 dependencies:
   analyzer: '>=6.9.0 <8.0.0'
-  build: ^2.0.0
+  build: ^3.0.0-dev
   source_gen: any
 
 dev_dependencies:

source_gen/CHANGELOG.md

@@ -1,5 +1,9 @@
-## 2.0.1-wip
+## 3.0.0-dev
 
+- **Breaking Change**: use the new `element2` APIs in `analyzer`. Builders that
+  do resolution need to switch to the new API, see
+  https://github.com/dart-lang/sdk/blob/main/pkg/analyzer/doc/element_model_migration_guide.md.
+  For questions please use https://github.com/dart-lang/build/discussions.
 - Require Dart 3.7.0
 
 ## 2.0.0

source_gen/pubspec.yaml

@@ -1,5 +1,5 @@
 name: source_gen
-version: 2.0.1-wip
+version: 3.0.0-dev
 description: >-
   Source code generation builders and utilities for the Dart build system
 repository: https://github.com/dart-lang/source_gen/tree/master/source_gen
@@ -11,7 +11,7 @@ environment:
 dependencies:
   analyzer: '>=6.9.0 <8.0.0'
   async: ^2.5.0
-  build: ^2.5.0
+  build: ^3.0.0-dev
   dart_style: '>=2.3.7 <4.0.0'
   glob: ^2.0.0
   path: ^1.8.0
@@ -22,51 +22,8 @@ dependencies:
 dev_dependencies:
   _test_annotations:
     path: ../_test_annotations
-  build_test: ^3.1.1
+  build_test: ^3.3.0-dev
   dart_flutter_team_lints: ^3.1.0
   logging: ^1.0.0
   term_glyph: ^1.2.0
   test: ^1.16.0
-
-dependency_overrides:
-  build:
-    git:
-      url: https://github.com/dart-lang/build
-      path: build
-      ref: f3c94b884657a213b7f6872602c900cc8ca471c7
-  build_config:
-    git:
-      url: https://github.com/dart-lang/build
-      path: build_config
-      ref: f3c94b884657a213b7f6872602c900cc8ca471c7
-  build_modules:
-    git:
-      url: https://github.com/dart-lang/build
-      path: build_modules
-      ref: f3c94b884657a213b7f6872602c900cc8ca471c7
-  build_resolvers:
-    git:
-      url: https://github.com/dart-lang/build
-      path: build_resolvers
-      ref: f3c94b884657a213b7f6872602c900cc8ca471c7
-  build_runner:
-    git:
-      url: https://github.com/dart-lang/build
-      path: build_runner
-      ref: f3c94b884657a213b7f6872602c900cc8ca471c7
-  build_runner_core:
-    git:
-      url: https://github.com/dart-lang/build
-      path: build_runner_core
-      ref: f3c94b884657a213b7f6872602c900cc8ca471c7
-  build_test:
-    git:
-      url: https://github.com/dart-lang/build
-      path: build_test
-      ref: f3c94b884657a213b7f6872602c900cc8ca471c7
-  build_web_compilers:
-    git:
-      url: https://github.com/dart-lang/build
-      path: build_web_compilers
-      ref: f3c94b884657a213b7f6872602c900cc8ca471c7
-