diff --git a/eng/Version.Details.xml b/eng/Version.Details.xml
index b54ad439b3ac..bfaab1801fcd 100644
--- a/eng/Version.Details.xml
+++ b/eng/Version.Details.xml
@@ -417,17 +417,17 @@
       <Uri>https://github.com/dotnet/extensions</Uri>
       <Sha>1286a6ff55e300352dabeb6d778c9fcdd258bd08</Sha>
     </Dependency>
-    <Dependency Name="Microsoft.DotNet.GenAPI" Version="1.0.0-beta.19607.3">
+    <Dependency Name="Microsoft.DotNet.GenAPI" Version="1.0.0-beta.20113.5">
       <Uri>https://github.com/dotnet/arcade</Uri>
-      <Sha>4d80b9cfa53e309c8f685abff3512f60c3d8a3d1</Sha>
+      <Sha>15f00efd583eab4372b2e9ca25bd80ace5b119ad</Sha>
     </Dependency>
-    <Dependency Name="Microsoft.DotNet.Arcade.Sdk" Version="1.0.0-beta.19607.3">
+    <Dependency Name="Microsoft.DotNet.Arcade.Sdk" Version="1.0.0-beta.20113.5">
       <Uri>https://github.com/dotnet/arcade</Uri>
-      <Sha>4d80b9cfa53e309c8f685abff3512f60c3d8a3d1</Sha>
+      <Sha>15f00efd583eab4372b2e9ca25bd80ace5b119ad</Sha>
     </Dependency>
-    <Dependency Name="Microsoft.DotNet.Helix.Sdk" Version="2.0.0-beta.19607.3">
+    <Dependency Name="Microsoft.DotNet.Helix.Sdk" Version="2.0.0-beta.20113.5">
       <Uri>https://github.com/dotnet/arcade</Uri>
-      <Sha>4d80b9cfa53e309c8f685abff3512f60c3d8a3d1</Sha>
+      <Sha>15f00efd583eab4372b2e9ca25bd80ace5b119ad</Sha>
     </Dependency>
     <Dependency Name="Microsoft.AspNetCore.Testing" Version="3.1.2-servicing.20067.6" CoherentParentDependency="Microsoft.EntityFrameworkCore">
       <Uri>https://github.com/dotnet/extensions</Uri>
diff --git a/eng/Versions.props b/eng/Versions.props
index 799adc7be603..f82258ff325e 100644
--- a/eng/Versions.props
+++ b/eng/Versions.props
@@ -62,7 +62,7 @@
   -->
   <PropertyGroup Label="Automated">
     <!-- Packages from dotnet/arcade -->
-    <MicrosoftDotNetGenAPIPackageVersion>1.0.0-beta.19607.3</MicrosoftDotNetGenAPIPackageVersion>
+    <MicrosoftDotNetGenAPIPackageVersion>1.0.0-beta.20113.5</MicrosoftDotNetGenAPIPackageVersion>
     <!-- Packages from dotnet/roslyn -->
     <MicrosoftNetCompilersToolsetPackageVersion>3.4.1-beta4-19614-01</MicrosoftNetCompilersToolsetPackageVersion>
     <!-- Packages from dotnet/core-setup -->
diff --git a/eng/common/darc-init.ps1 b/eng/common/darc-init.ps1
index 46d175fdfdca..b94c2f4e411d 100644
--- a/eng/common/darc-init.ps1
+++ b/eng/common/darc-init.ps1
@@ -27,7 +27,7 @@ function InstallDarcCli ($darcVersion) {
 
   Write-Host "Installing Darc CLI version $darcVersion..."
   Write-Host "You may need to restart your command window if this is the first dotnet tool you have installed."
-  & "$dotnet" tool install $darcCliPackageName --version $darcVersion --add-source "$arcadeServicesSource" -v $verbosity -g
+  & "$dotnet" tool install $darcCliPackageName --version $darcVersion --add-source "$arcadeServicesSource" -v $verbosity -g --framework netcoreapp2.1
 }
 
 InstallDarcCli $darcVersion
diff --git a/eng/common/templates/post-build/post-build.yml b/eng/common/templates/post-build/post-build.yml
index b121d77e07d1..3c69186f03a7 100644
--- a/eng/common/templates/post-build/post-build.yml
+++ b/eng/common/templates/post-build/post-build.yml
@@ -341,4 +341,28 @@ stages:
     channelId: 557
     transportFeed: 'https://pkgs.dev.azure.com/dnceng/_packaging/dotnet3.1-internal-transport/nuget/v3/index.json'
     shippingFeed: 'https://pkgs.dev.azure.com/dnceng/_packaging/dotnet3.1-internal/nuget/v3/index.json'
+    symbolsFeed: 'https://pkgs.dev.azure.com/dnceng/_packaging/dotnet3.1-internal-symbols/nuget/v3/index.json'
+
+- template: \eng\common\templates\post-build\channels\generic-public-channel.yml
+  parameters:
+    artifactsPublishingAdditionalParameters: ${{ parameters.artifactsPublishingAdditionalParameters }}
+    publishInstallersAndChecksums: ${{ parameters.publishInstallersAndChecksums }}
+    symbolPublishingAdditionalParameters: ${{ parameters.symbolPublishingAdditionalParameters }}
+    stageName: 'NETCore_SDK_313xx_Publishing'
+    channelName: '.NET Core SDK 3.1.3xx'
+    channelId: 759
+    transportFeed: 'https://pkgs.dev.azure.com/dnceng/public/_packaging/dotnet3.1-transport/nuget/v3/index.json'
+    shippingFeed: 'https://pkgs.dev.azure.com/dnceng/public/_packaging/dotnet3.1/nuget/v3/index.json'
+    symbolsFeed: 'https://pkgs.dev.azure.com/dnceng/public/_packaging/dotnet3.1-symbols/nuget/v3/index.json'
+
+- template: \eng\common\templates\post-build\channels\generic-internal-channel.yml
+  parameters:
+    artifactsPublishingAdditionalParameters: ${{ parameters.artifactsPublishingAdditionalParameters }}
+    publishInstallersAndChecksums: ${{ parameters.publishInstallersAndChecksums }}
+    symbolPublishingAdditionalParameters: ${{ parameters.symbolPublishingAdditionalParameters }}
+    stageName: 'NETCore_SDK_313xx_Internal_Publishing'
+    channelName: '.NET Core SDK 3.1.3xx Internal'
+    channelId: 760
+    transportFeed: 'https://pkgs.dev.azure.com/dnceng/_packaging/dotnet3.1-internal-transport/nuget/v3/index.json'
+    shippingFeed: 'https://pkgs.dev.azure.com/dnceng/_packaging/dotnet3.1-internal/nuget/v3/index.json'
     symbolsFeed: 'https://pkgs.dev.azure.com/dnceng/_packaging/dotnet3.1-internal-symbols/nuget/v3/index.json'
\ No newline at end of file
diff --git a/eng/common/tools.sh b/eng/common/tools.sh
index 62218302268f..94965a8fd2a9 100755
--- a/eng/common/tools.sh
+++ b/eng/common/tools.sh
@@ -210,15 +210,7 @@ function InstallDotNet {
 
       local runtimeSourceFeedKey=''
       if [[ -n "${7:-}" ]]; then
-        # The 'base64' binary on alpine uses '-d' and doesn't support '--decode'
-        # like the rest of the unix variants. At the same time, MacOS doesn't support
-        # '-d'. To work around this, do a simple detection and switch the parameter
-        # accordingly.
-        decodeArg="--decode"
-        if base64 --help 2>&1 | grep -q "BusyBox"; then
-            decodeArg="-d"
-        fi
-        decodedFeedKey=`echo $7 | base64 $decodeArg`
+        decodedFeedKey=`echo $7 | base64 --decode`
         runtimeSourceFeedKey="--feed-credential $decodedFeedKey"
       fi
 
diff --git a/global.json b/global.json
index 3070303dd920..e1e9eebf33bd 100644
--- a/global.json
+++ b/global.json
@@ -25,7 +25,7 @@
   },
   "msbuild-sdks": {
     "Yarn.MSBuild": "1.15.2",
-    "Microsoft.DotNet.Arcade.Sdk": "1.0.0-beta.19607.3",
-    "Microsoft.DotNet.Helix.Sdk": "2.0.0-beta.19607.3"
+    "Microsoft.DotNet.Arcade.Sdk": "1.0.0-beta.20113.5",
+    "Microsoft.DotNet.Helix.Sdk": "2.0.0-beta.20113.5"
   }
 }