diff --git a/src/SourceBuild/content/eng/Version.Details.xml b/src/SourceBuild/content/eng/Version.Details.xml
index ea94169d60f6..876705d94e26 100644
--- a/src/SourceBuild/content/eng/Version.Details.xml
+++ b/src/SourceBuild/content/eng/Version.Details.xml
@@ -2,9 +2,9 @@
   <ProductDependencies>
   </ProductDependencies>
   <ToolsetDependencies>
-    <Dependency Name="Microsoft.DotNet.Arcade.Sdk" Version="10.0.0-beta.24551.1">
+    <Dependency Name="Microsoft.DotNet.Arcade.Sdk" Version="10.0.0-beta.24604.4">
       <Uri>https://github.com/dotnet/arcade</Uri>
-      <Sha>1818ed2babf890a1cd62fa96a1f03abdada2d003</Sha>
+      <Sha>45d845e04c05fbe5da9838c454bbc3af1df6be81</Sha>
     </Dependency>
   </ToolsetDependencies>
 </Dependencies>
diff --git a/src/SourceBuild/content/eng/Versions.props b/src/SourceBuild/content/eng/Versions.props
index 0f0784c94bf6..ef967f7d3b16 100644
--- a/src/SourceBuild/content/eng/Versions.props
+++ b/src/SourceBuild/content/eng/Versions.props
@@ -23,9 +23,9 @@
       of a .NET major or minor release, prebuilts may be needed. When the release is mature, prebuilts
       are not necessary, and this property is removed from the file.
     -->
-    <PrivateSourceBuiltSdkVersion>10.0.100-alpha.1.24556.1</PrivateSourceBuiltSdkVersion>
-    <PrivateSourceBuiltArtifactsVersion>10.0.100-alpha.1.24556.1</PrivateSourceBuiltArtifactsVersion>
-    <PrivateSourceBuiltPrebuiltsVersion>0.1.0-10.0.100-6</PrivateSourceBuiltPrebuiltsVersion>
+    <PrivateSourceBuiltSdkVersion>10.0.100-alpha.1.24612.1</PrivateSourceBuiltSdkVersion>
+    <PrivateSourceBuiltArtifactsVersion>10.0.100-alpha.1.24612.1</PrivateSourceBuiltArtifactsVersion>
+    <PrivateSourceBuiltPrebuiltsVersion>0.1.0-10.0.100-7</PrivateSourceBuiltPrebuiltsVersion>
     <!-- command-line-api dependencies -->
     <SystemCommandLineVersion>2.0.0-beta4.24126.1</SystemCommandLineVersion>
     <!-- msbuild dependencies -->
diff --git a/src/SourceBuild/content/global.json b/src/SourceBuild/content/global.json
index 0cef1ca7ad9d..86ca740c5b0e 100644
--- a/src/SourceBuild/content/global.json
+++ b/src/SourceBuild/content/global.json
@@ -1,10 +1,10 @@
 {
   "tools": {
-    "dotnet": "10.0.100-alpha.1.24555.54"
+    "dotnet": "10.0.100-alpha.1.24611.6"
   },
   "msbuild-sdks": {
     "Microsoft.Build.NoTargets": "3.7.0",
     "Microsoft.Build.Traversal": "3.4.0",
-    "Microsoft.DotNet.Arcade.Sdk": "10.0.0-beta.24551.1"
+    "Microsoft.DotNet.Arcade.Sdk": "10.0.0-beta.24604.4"
   }
 }
diff --git a/src/SourceBuild/content/repo-projects/Directory.Build.targets b/src/SourceBuild/content/repo-projects/Directory.Build.targets
index c554a1082169..bb29224dbc4e 100644
--- a/src/SourceBuild/content/repo-projects/Directory.Build.targets
+++ b/src/SourceBuild/content/repo-projects/Directory.Build.targets
@@ -300,7 +300,7 @@
 
     <!-- Get the previously-built-source-built package information from the manifest from that build. -->
     <ItemGroup>
-      <_PrebuiltSourceBuiltAssetManifests Include="$(PrebuiltSourceBuiltPackagesPath)VerticalManifest.xml" />
+      <_PrebuiltSourceBuiltAssetManifests Include="$(PrebuiltSourceBuiltPackagesPath)*.xml" />
     </ItemGroup>
 
     <GetKnownArtifactsFromAssetManifests AssetManifests="@(_PrebuiltSourceBuiltAssetManifests)" Condition="Exists(@(_PrebuiltSourceBuiltAssetManifests))">
diff --git a/src/SourceBuild/patches/arcade/0002-Upgrade-System.Memory-to-4.6.0.patch b/src/SourceBuild/patches/arcade/0002-Upgrade-System.Memory-to-4.6.0.patch
new file mode 100644
index 000000000000..c6b884dcacdc
--- /dev/null
+++ b/src/SourceBuild/patches/arcade/0002-Upgrade-System.Memory-to-4.6.0.patch
@@ -0,0 +1,24 @@
+From da982568108371f51afb30cc8c32eab01653bd62 Mon Sep 17 00:00:00 2001
+From: Matt Thalman <mthalman@microsoft.com>
+Date: Fri, 20 Dec 2024 12:40:34 -0600
+Subject: [PATCH] Upgrade System.Memory to 4.6.0
+
+Backport: https://github.com/dotnet/arcade/pull/15353
+---
+ eng/Versions.props | 3 ++-
+ 1 file changed, 2 insertions(+), 1 deletion(-)
+
+diff --git a/eng/Versions.props b/eng/Versions.props
+index a00db9a77..ad3e2a9f9 100644
+--- a/eng/Versions.props
++++ b/eng/Versions.props
+@@ -18,7 +18,8 @@
+     <SystemCommandLineVersion>2.0.0-beta4.24126.1</SystemCommandLineVersion>
+     <!-- corefx -->
+     <MicrosoftBclHashCodeVersion>1.1.1</MicrosoftBclHashCodeVersion>
+-    <SystemMemoryVersion>4.5.5</SystemMemoryVersion>
++    <SystemMemoryVersion Condition="'$(DotNetBuildSourceOnly)' == 'true'">4.6.0</SystemMemoryVersion>
++    <SystemMemoryVersion Condition="'$(DotNetBuildSourceOnly)' != 'true'">4.5.5</SystemMemoryVersion>
+     <SystemRuntimeInteropServicesRuntimeInformation>4.3.0</SystemRuntimeInteropServicesRuntimeInformation>
+     <!-- deployment-tools -->
+     <MicrosoftDeploymentDotNetReleasesVersion>2.0.0-preview.1.24305.1</MicrosoftDeploymentDotNetReleasesVersion>
diff --git a/src/SourceBuild/patches/fsharp/0001-Upgrade-some-runtime-packages.patch b/src/SourceBuild/patches/fsharp/0001-Upgrade-some-runtime-packages.patch
new file mode 100644
index 000000000000..c12d61eb6c7d
--- /dev/null
+++ b/src/SourceBuild/patches/fsharp/0001-Upgrade-some-runtime-packages.patch
@@ -0,0 +1,33 @@
+From 192a16dca94744c82ca456d6cfb7a2a30be1d84f Mon Sep 17 00:00:00 2001
+From: Matt Thalman <mthalman@microsoft.com>
+Date: Thu, 19 Dec 2024 11:00:01 -0600
+Subject: [PATCH] Upgrade some runtime packages
+
+Backport: https://github.com/dotnet/fsharp/pull/18166
+---
+ eng/Versions.props | 6 +++---
+ 1 file changed, 3 insertions(+), 3 deletions(-)
+
+diff --git a/eng/Versions.props b/eng/Versions.props
+index cd72f8599..1f711df8f 100644
+--- a/eng/Versions.props
++++ b/eng/Versions.props
+@@ -76,15 +76,15 @@
+     <!-- If a System.* package is stuck on version 4.3.x, targets .NET Standard 1.x and hasn't been
+     updated in years, you most likely DON'T need it, please exercise caution when adding it to the list. -->
+     <SystemPackageVersionVersion>8.0.0</SystemPackageVersionVersion>
+-    <SystemBuffersVersion>4.5.1</SystemBuffersVersion>
++    <SystemBuffersVersion>4.6.0</SystemBuffersVersion>
+     <SystemCollectionsImmutableVersion>$(SystemPackageVersionVersion)</SystemCollectionsImmutableVersion>
+     <SystemComponentModelCompositionVersion>$(SystemPackageVersionVersion)</SystemComponentModelCompositionVersion>
+     <SystemCompositionVersion>$(SystemPackageVersionVersion)</SystemCompositionVersion>
+     <SystemDiagnosticsDiagnosticSourceVersion>$(SystemPackageVersionVersion)</SystemDiagnosticsDiagnosticSourceVersion>
+-    <SystemMemoryVersion>4.5.5</SystemMemoryVersion>
++    <SystemMemoryVersion>4.6.0</SystemMemoryVersion>
+     <SystemReflectionEmitVersion>4.7.0</SystemReflectionEmitVersion>
+     <SystemReflectionMetadataVersion>$(SystemPackageVersionVersion)</SystemReflectionMetadataVersion>
+-    <SystemRuntimeCompilerServicesUnsafeVersion>6.0.0</SystemRuntimeCompilerServicesUnsafeVersion>
++    <SystemRuntimeCompilerServicesUnsafeVersion>6.1.0</SystemRuntimeCompilerServicesUnsafeVersion>
+     <SystemThreadingTasksDataflow>$(SystemPackageVersionVersion)</SystemThreadingTasksDataflow>
+     <SystemValueTupleVersion>4.5.0</SystemValueTupleVersion>
+     <MicrosoftDiaSymReaderPortablePdbVersion>1.6.0</MicrosoftDiaSymReaderPortablePdbVersion>
diff --git a/src/SourceBuild/patches/roslyn/0002-Only-target-NetCurrent-for-source-build.patch b/src/SourceBuild/patches/roslyn/0002-Only-target-NetCurrent-for-source-build.patch
new file mode 100644
index 000000000000..7a637a421688
--- /dev/null
+++ b/src/SourceBuild/patches/roslyn/0002-Only-target-NetCurrent-for-source-build.patch
@@ -0,0 +1,27 @@
+From 3e23c76f9f26e0b559096d9349d0abadb092d704 Mon Sep 17 00:00:00 2001
+From: Matt Thalman <mthalman@microsoft.com>
+Date: Fri, 20 Dec 2024 08:28:35 -0600
+Subject: [PATCH] Only target NetCurrent for source build
+
+Backport: https://github.com/dotnet/roslyn/pull/76505
+---
+ eng/targets/TargetFrameworks.props | 6 +++---
+ 1 file changed, 3 insertions(+), 3 deletions(-)
+
+diff --git a/eng/targets/TargetFrameworks.props b/eng/targets/TargetFrameworks.props
+index 2dddaff1560..04eecc62df9 100644
+--- a/eng/targets/TargetFrameworks.props
++++ b/eng/targets/TargetFrameworks.props
+@@ -53,9 +53,9 @@
+     <When Condition="'$(DotNetBuildSourceOnly)' == 'true' AND '$(DotNetBuildOrchestrator)' == 'true'">
+       <PropertyGroup>
+         <NetRoslyn>$(NetCurrent)</NetRoslyn>
+-        <NetRoslynSourceBuild>$(NetCurrent);$(NetPrevious)</NetRoslynSourceBuild>
+-        <NetRoslynAll>$(NetCurrent);$(NetPrevious)</NetRoslynAll>
+-        <NetRoslynBuildHostNetCoreVersion>$(NetPrevious)</NetRoslynBuildHostNetCoreVersion>
++        <NetRoslynSourceBuild>$(NetCurrent)</NetRoslynSourceBuild>
++        <NetRoslynAll>$(NetCurrent)</NetRoslynAll>
++        <NetRoslynBuildHostNetCoreVersion>$(NetCurrent)</NetRoslynBuildHostNetCoreVersion>
+         <NetRoslynNext>$(NetCurrent)</NetRoslynNext>
+       </PropertyGroup>
+     </When>