diff --git a/eng/Version.Details.xml b/eng/Version.Details.xml
index b06376f547d..a129a95dffa 100644
--- a/eng/Version.Details.xml
+++ b/eng/Version.Details.xml
@@ -8,14 +8,14 @@
     </Dependency>
   </ProductDependencies>
   <ToolsetDependencies>
-    <Dependency Name="Microsoft.DotNet.Arcade.Sdk" Version="8.0.0-beta.22480.2">
+    <Dependency Name="Microsoft.DotNet.Arcade.Sdk" Version="8.0.0-beta.22503.1">
       <Uri>https://github.com/dotnet/arcade</Uri>
-      <Sha>60e9ab3c31d68167f8dac5b8e2c536deb12ef737</Sha>
+      <Sha>d2d39276af2db3da7816ee2dc543e120d7e5781e</Sha>
       <SourceBuild RepoName="arcade" ManagedOnly="true" />
     </Dependency>
-    <Dependency Name="Microsoft.DotNet.Helix.Sdk" Version="8.0.0-beta.22480.2">
+    <Dependency Name="Microsoft.DotNet.Helix.Sdk" Version="8.0.0-beta.22503.1">
       <Uri>https://github.com/dotnet/arcade</Uri>
-      <Sha>60e9ab3c31d68167f8dac5b8e2c536deb12ef737</Sha>
+      <Sha>d2d39276af2db3da7816ee2dc543e120d7e5781e</Sha>
     </Dependency>
   </ToolsetDependencies>
 </Dependencies>
diff --git a/eng/common/cross/build-rootfs.sh b/eng/common/cross/build-rootfs.sh
index 5680980fa29..eddb4c380af 100755
--- a/eng/common/cross/build-rootfs.sh
+++ b/eng/common/cross/build-rootfs.sh
@@ -391,9 +391,9 @@ elif [[ "$__CodeName" == "illumos" ]]; then
         --with-gnu-ld --disable-nls --disable-libgomp --disable-libquadmath --disable-libssp --disable-libvtv --disable-libcilkrts --disable-libada --disable-libsanitizer \
         --disable-libquadmath-support --disable-shared --enable-tls
     make -j "$JOBS" && make install && cd ..
-    BaseUrl=https://pkgsrc.joyent.com
+    BaseUrl=https://pkgsrc.smartos.org
     if [[ "$__UseMirror" == 1 ]]; then
-        BaseUrl=http://pkgsrc.smartos.skylime.net
+        BaseUrl=https://pkgsrc.smartos.skylime.net
     fi
     BaseUrl="$BaseUrl/packages/SmartOS/trunk/${__illumosArch}/All"
     echo "Downloading manifest"
@@ -402,7 +402,8 @@ elif [[ "$__CodeName" == "illumos" ]]; then
     read -ra array <<<"$__IllumosPackages"
     for package in "${array[@]}"; do
         echo "Installing '$package'"
-        package="$(grep ">$package-[0-9]" All | sed -En 's/.*href="(.*)\.tgz".*/\1/p')"
+        # find last occurrence of package in listing and extract its name
+        package="$(sed -En '/.*href="('"$package"'-[0-9].*).tgz".*/h;$!d;g;s//\1/p' All)"
         echo "Resolved name '$package'"
         wget "$BaseUrl"/"$package".tgz
         ar -x "$package".tgz
diff --git a/eng/common/templates/steps/source-build.yml b/eng/common/templates/steps/source-build.yml
index 4ec5577d28a..a97a185a367 100644
--- a/eng/common/templates/steps/source-build.yml
+++ b/eng/common/templates/steps/source-build.yml
@@ -63,6 +63,11 @@ steps:
       targetRidArgs='/p:TargetRid=${{ parameters.platform.targetRID }}'
     fi
 
+    runtimeOsArgs=
+    if [ '${{ parameters.platform.runtimeOS }}' != '' ]; then
+      runtimeOsArgs='/p:RuntimeOS=${{ parameters.platform.runtimeOS }}'
+    fi
+
     publishArgs=
     if [ '${{ parameters.platform.skipPublishValidation }}' != 'true' ]; then
       publishArgs='--publish'
@@ -80,6 +85,7 @@ steps:
       $internalRuntimeDownloadArgs \
       $internalRestoreArgs \
       $targetRidArgs \
+      $runtimeOsArgs \
       /p:SourceBuildNonPortable=${{ parameters.platform.nonPortable }} \
       /p:ArcadeBuildFromSource=true \
       /p:AssetManifestFileName=$assetManifestFileName
diff --git a/global.json b/global.json
index 91bb40453aa..f44a501cf14 100644
--- a/global.json
+++ b/global.json
@@ -18,7 +18,7 @@
     "perl": "5.32.1.1"
   },
   "msbuild-sdks": {
-    "Microsoft.DotNet.Arcade.Sdk": "8.0.0-beta.22480.2",
-    "Microsoft.DotNet.Helix.Sdk": "8.0.0-beta.22480.2"
+    "Microsoft.DotNet.Arcade.Sdk": "8.0.0-beta.22503.1",
+    "Microsoft.DotNet.Helix.Sdk": "8.0.0-beta.22503.1"
   }
 }