diff --git a/eng/SourceBuildPrebuiltBaseline.xml b/eng/SourceBuildPrebuiltBaseline.xml
index 4185d755fa6129..296c7a7f4b81df 100644
--- a/eng/SourceBuildPrebuiltBaseline.xml
+++ b/eng/SourceBuildPrebuiltBaseline.xml
@@ -35,5 +35,18 @@
     <UsagePattern IdentityGlob="System.IO.Pipelines/7.0.0" />
     <UsagePattern IdentityGlob="System.IO.Pipelines/8.0.*" />
     <UsagePattern IdentityGlob="System.Security.Cryptography.Pkcs/5.0.0" />
+
+    <!-- Dependencies of Roslyn, replaced with live packages during full source build
+         https://github.com/dotnet/runtime/pull/112937#discussion_r2022951143 -->
+    <UsagePattern IdentityGlob="Microsoft.Bcl.AsyncInterfaces/9.0.0" />
+    <UsagePattern IdentityGlob="System.Collections.Immutable/9.0.0" />
+    <UsagePattern IdentityGlob="System.Composition/9.0.0" />
+    <UsagePattern IdentityGlob="System.Composition.AttributedModel/9.0.0" />
+    <UsagePattern IdentityGlob="System.Composition.Convention/9.0.0" />
+    <UsagePattern IdentityGlob="System.Composition.Hosting/9.0.0" />
+    <UsagePattern IdentityGlob="System.Composition.Runtime/9.0.0" />
+    <UsagePattern IdentityGlob="System.Composition.TypedParts/9.0.0" />
+    <UsagePattern IdentityGlob="System.IO.Pipelines/9.0.0" />
+    <UsagePattern IdentityGlob="System.Reflection.Metadata/9.0.0" />
   </IgnorePatterns>
 </UsageData>
diff --git a/eng/Version.Details.xml b/eng/Version.Details.xml
index 816de427c66c3a..99a531175fddf7 100644
--- a/eng/Version.Details.xml
+++ b/eng/Version.Details.xml
@@ -360,30 +360,30 @@
       <Uri>https://github.com/dotnet/runtime-assets</Uri>
       <Sha>91ea918f8fb26ec1d290283e5c5eeb1b003113da</Sha>
     </Dependency>
-    <Dependency Name="Microsoft.Net.Compilers.Toolset" Version="4.12.0-3.25569.8">
+    <Dependency Name="Microsoft.Net.Compilers.Toolset" Version="4.14.0-3.25609.16">
       <Uri>https://github.com/dotnet/roslyn</Uri>
-      <Sha>dc344ef24932dcd53cdd24c15364a5996bc6a675</Sha>
+      <Sha>44b81fc54139e9fce040efc2a6558110c038896b</Sha>
     </Dependency>
-    <Dependency Name="Microsoft.CodeAnalysis" Version="4.12.0-3.25569.8">
+    <Dependency Name="Microsoft.CodeAnalysis" Version="4.14.0-3.25609.16">
       <Uri>https://github.com/dotnet/roslyn</Uri>
-      <Sha>dc344ef24932dcd53cdd24c15364a5996bc6a675</Sha>
+      <Sha>44b81fc54139e9fce040efc2a6558110c038896b</Sha>
     </Dependency>
-    <Dependency Name="Microsoft.CodeAnalysis.CSharp" Version="4.12.0-3.25569.8">
+    <Dependency Name="Microsoft.CodeAnalysis.CSharp" Version="4.14.0-3.25609.16">
       <Uri>https://github.com/dotnet/roslyn</Uri>
-      <Sha>dc344ef24932dcd53cdd24c15364a5996bc6a675</Sha>
+      <Sha>44b81fc54139e9fce040efc2a6558110c038896b</Sha>
     </Dependency>
-    <Dependency Name="Microsoft.CodeAnalysis.Analyzers" Version="3.11.0-beta1.25615.3">
-      <Uri>https://github.com/dotnet/roslyn-analyzers</Uri>
-      <Sha>7576c1d00aeef14c682c31b193ff8e58273cdd16</Sha>
+    <Dependency Name="Microsoft.CodeAnalysis.Analyzers" Version="3.12.0-beta1.25609.16">
+      <Uri>https://github.com/dotnet/roslyn</Uri>
+      <Sha>44b81fc54139e9fce040efc2a6558110c038896b</Sha>
     </Dependency>
     <Dependency Name="Microsoft.CodeAnalysis.NetAnalyzers" Version="9.0.0-preview.25615.3">
       <Uri>https://github.com/dotnet/roslyn-analyzers</Uri>
       <Sha>7576c1d00aeef14c682c31b193ff8e58273cdd16</Sha>
     </Dependency>
     <!-- Intermediate is necessary for source build. -->
-    <Dependency Name="Microsoft.SourceBuild.Intermediate.roslyn" Version="4.12.0-3.25569.8">
+    <Dependency Name="Microsoft.SourceBuild.Intermediate.roslyn" Version="4.14.0-3.25609.16">
       <Uri>https://github.com/dotnet/roslyn</Uri>
-      <Sha>dc344ef24932dcd53cdd24c15364a5996bc6a675</Sha>
+      <Sha>44b81fc54139e9fce040efc2a6558110c038896b</Sha>
       <SourceBuild RepoName="roslyn" ManagedOnly="true" />
     </Dependency>
     <Dependency Name="Microsoft.DotNet.ApiCompat.Task" Version="9.0.109">
diff --git a/eng/Versions.props b/eng/Versions.props
index 492c253049f66d..548657d0ea25ba 100644
--- a/eng/Versions.props
+++ b/eng/Versions.props
@@ -28,15 +28,13 @@
     <FlagNetStandard1XDependencies Condition="'$(FlagNetStandard1XDependencies)' == ''">true</FlagNetStandard1XDependencies>
     <!-- Runtime controls its dependency graph via Traversal projects and doesn't want or need Arcade's ExcludeFrom infrastructure. -->
     <DisableArcadeExcludeFromBuildSupport>true</DisableArcadeExcludeFromBuildSupport>
-    <!-- Use SDK compilers in full VMR builds. -->
-    <UsingToolMicrosoftNetCompilers Condition="'$(DotNetBuildOrchestrator)' != 'true'">true</UsingToolMicrosoftNetCompilers>
   </PropertyGroup>
   <ItemGroup>
     <WorkloadSdkBandVersions Include="$(SdkBandVersion)" SupportsMachineArch="true" />
   </ItemGroup>
   <PropertyGroup>
     <!-- dotnet/roslyn-analyzers dependencies -->
-    <MicrosoftCodeAnalysisAnalyzersVersion>3.11.0-beta1.25615.3</MicrosoftCodeAnalysisAnalyzersVersion>
+    <MicrosoftCodeAnalysisAnalyzersVersion>3.12.0-beta1.25609.16</MicrosoftCodeAnalysisAnalyzersVersion>
     <MicrosoftCodeAnalysisNetAnalyzersVersion>9.0.0-preview.25615.3</MicrosoftCodeAnalysisNetAnalyzersVersion>
     <!-- dotnet/roslyn dependencies -->
     <!--
@@ -44,9 +42,9 @@
       Any tools that contribute to the design-time experience should use the MicrosoftCodeAnalysisVersion_LatestVS property above to ensure
       they do not break the local dev experience.
     -->
-    <MicrosoftCodeAnalysisCSharpVersion>4.12.0-3.25569.8</MicrosoftCodeAnalysisCSharpVersion>
-    <MicrosoftCodeAnalysisVersion>4.12.0-3.25569.8</MicrosoftCodeAnalysisVersion>
-    <MicrosoftNetCompilersToolsetVersion>4.12.0-3.25569.8</MicrosoftNetCompilersToolsetVersion>
+    <MicrosoftCodeAnalysisCSharpVersion>4.14.0-3.25609.16</MicrosoftCodeAnalysisCSharpVersion>
+    <MicrosoftCodeAnalysisVersion>4.14.0-3.25609.16</MicrosoftCodeAnalysisVersion>
+    <MicrosoftNetCompilersToolsetVersion>4.14.0-3.25609.16</MicrosoftNetCompilersToolsetVersion>
   </PropertyGroup>
   <!--
     For source generator support we need to target multiple versions of Roslyn in order to be able to run on older versions of Roslyn.
diff --git a/src/libraries/System.Runtime.InteropServices/tests/LibraryImportGenerator.UnitTests/CustomMarshallerAttributeFixerTests_StatefulLinearCollectionShapeValidation.cs b/src/libraries/System.Runtime.InteropServices/tests/LibraryImportGenerator.UnitTests/CustomMarshallerAttributeFixerTests_StatefulLinearCollectionShapeValidation.cs
index 2aedfde9936f47..eb60cf353dbcce 100644
--- a/src/libraries/System.Runtime.InteropServices/tests/LibraryImportGenerator.UnitTests/CustomMarshallerAttributeFixerTests_StatefulLinearCollectionShapeValidation.cs
+++ b/src/libraries/System.Runtime.InteropServices/tests/LibraryImportGenerator.UnitTests/CustomMarshallerAttributeFixerTests_StatefulLinearCollectionShapeValidation.cs
@@ -602,7 +602,6 @@ public void FromManaged(ManagedType m, Span<byte> buffer) {}
                     public void Free() {}
                     public ReadOnlySpan<byte> GetManagedValuesSource() => default;
                     public Span<T> GetUnmanagedValuesDestination() => default;
-
                     public static int BufferSize
                     {
                         get
diff --git a/src/libraries/System.Runtime.InteropServices/tests/LibraryImportGenerator.UnitTests/CustomMarshallerAttributeFixerTests_StatefulValueShapeValidation.cs b/src/libraries/System.Runtime.InteropServices/tests/LibraryImportGenerator.UnitTests/CustomMarshallerAttributeFixerTests_StatefulValueShapeValidation.cs
index 9a72a5fbc4916f..cb2c5d8caf10ec 100644
--- a/src/libraries/System.Runtime.InteropServices/tests/LibraryImportGenerator.UnitTests/CustomMarshallerAttributeFixerTests_StatefulValueShapeValidation.cs
+++ b/src/libraries/System.Runtime.InteropServices/tests/LibraryImportGenerator.UnitTests/CustomMarshallerAttributeFixerTests_StatefulValueShapeValidation.cs
@@ -382,7 +382,6 @@ public void FromManaged(ManagedType m, Span<byte> b) {}
                     public int ToUnmanaged() => default;
 
                     public void Free() {}
-
                     public static int BufferSize
                     {
                         get
diff --git a/src/libraries/System.Runtime.InteropServices/tests/LibraryImportGenerator.UnitTests/CustomMarshallerAttributeFixerTests_StatelessLinearCollectionShapeValidation.cs b/src/libraries/System.Runtime.InteropServices/tests/LibraryImportGenerator.UnitTests/CustomMarshallerAttributeFixerTests_StatelessLinearCollectionShapeValidation.cs
index fec16b2bc7ff7c..b60bb78f2acc2b 100644
--- a/src/libraries/System.Runtime.InteropServices/tests/LibraryImportGenerator.UnitTests/CustomMarshallerAttributeFixerTests_StatelessLinearCollectionShapeValidation.cs
+++ b/src/libraries/System.Runtime.InteropServices/tests/LibraryImportGenerator.UnitTests/CustomMarshallerAttributeFixerTests_StatelessLinearCollectionShapeValidation.cs
@@ -614,7 +614,6 @@ static class MarshallerType<T>
                     public static ReadOnlySpan<int> GetManagedValuesSource(ManagedType m) => default;
 
                     public static Span<T> GetUnmanagedValuesDestination(nint unmanaged, int numElements) => default;
-
                     public static int BufferSize
                     {
                         get
diff --git a/src/libraries/System.Runtime.InteropServices/tests/LibraryImportGenerator.UnitTests/CustomMarshallerAttributeFixerTests_StatelessValueShapeValidation.cs b/src/libraries/System.Runtime.InteropServices/tests/LibraryImportGenerator.UnitTests/CustomMarshallerAttributeFixerTests_StatelessValueShapeValidation.cs
index 7d94afb9985f79..35c90af32f81b2 100644
--- a/src/libraries/System.Runtime.InteropServices/tests/LibraryImportGenerator.UnitTests/CustomMarshallerAttributeFixerTests_StatelessValueShapeValidation.cs
+++ b/src/libraries/System.Runtime.InteropServices/tests/LibraryImportGenerator.UnitTests/CustomMarshallerAttributeFixerTests_StatelessValueShapeValidation.cs
@@ -363,7 +363,6 @@ class ManagedType {}
                 static class MarshallerType
                 {
                     public static nint ConvertToUnmanaged(ManagedType m, Span<byte> b) => default;
-
                     public static int BufferSize
                     {
                         get
diff --git a/src/libraries/System.Text.RegularExpressions/tests/FunctionalTests/UpgradeToGeneratedRegexAnalyzerTests.cs b/src/libraries/System.Text.RegularExpressions/tests/FunctionalTests/UpgradeToGeneratedRegexAnalyzerTests.cs
index feca0c535edf97..c1a704287c87be 100644
--- a/src/libraries/System.Text.RegularExpressions/tests/FunctionalTests/UpgradeToGeneratedRegexAnalyzerTests.cs
+++ b/src/libraries/System.Text.RegularExpressions/tests/FunctionalTests/UpgradeToGeneratedRegexAnalyzerTests.cs
@@ -85,9 +85,7 @@ public async Task TopLevelStatements(InvocationType invocationType)
             string test = @"using System.Text.RegularExpressions;
 var isMatch = [|" + ConstructRegexInvocation(invocationType, pattern: "\"\"") + @"|]" + isMatchInvocation + ";";
             string fixedCode = @"using System.Text.RegularExpressions;
-var isMatch = MyRegex().IsMatch("""");
-
-partial class Program
+var isMatch = MyRegex().IsMatch(""""); partial class Program
 {
     [GeneratedRegex("""")]
     private static partial Regex MyRegex();
@@ -850,9 +848,7 @@ public async Task TopLevelStatements_MultipleSourceFiles()
                 },
                 FixedState =
                 {
-                    Sources = { "public class C { }", @"var r = MyRegex();
-
-partial class Program
+                    Sources = { "public class C { }", @"var r = MyRegex(); partial class Program
 {
     [System.Text.RegularExpressions.GeneratedRegex("""")]
     private static partial System.Text.RegularExpressions.Regex MyRegex();
diff --git a/src/tools/illink/test/ILLink.RoslynAnalyzer.Tests.Generator/ILLink.RoslynAnalyzer.Tests.Generator.csproj b/src/tools/illink/test/ILLink.RoslynAnalyzer.Tests.Generator/ILLink.RoslynAnalyzer.Tests.Generator.csproj
index 095efe39a63b9a..17489190fc16b5 100644
--- a/src/tools/illink/test/ILLink.RoslynAnalyzer.Tests.Generator/ILLink.RoslynAnalyzer.Tests.Generator.csproj
+++ b/src/tools/illink/test/ILLink.RoslynAnalyzer.Tests.Generator/ILLink.RoslynAnalyzer.Tests.Generator.csproj
@@ -6,7 +6,7 @@
   </PropertyGroup>
 
   <ItemGroup>
-    <PackageReference Include="Microsoft.CodeAnalysis.CSharp" Version="$(MicrosoftCodeAnalysisVersion)" />
+    <PackageReference Include="Microsoft.CodeAnalysis.CSharp" Version="$(MicrosoftCodeAnalysisVersion_LatestVS)" />
   </ItemGroup>
 
 </Project>