diff --git a/docker-compose-windows.yml b/docker-compose-windows.yml
index 9c6aa27a21c6..17e964eedbfe 100644
--- a/docker-compose-windows.yml
+++ b/docker-compose-windows.yml
@@ -97,6 +97,17 @@ services:
       - cobalt-build-win32-base
     image: cobalt-build-win-win32
 
+  build-xb1:
+    <<: *common-definitions
+    build:
+      context: ./docker/windows/xb1
+      dockerfile: ./Dockerfile
+      args:
+        - FROM_IMAGE=cobalt-build-win-base
+    depends_on:
+      - cobalt-build-win-base
+    image: cobalt-build-xb1
+
   # -----------------------------------------
   # Win32 Platform Images for Building Cobalt
   # -----------------------------------------
@@ -115,6 +126,16 @@ services:
       PLATFORM: win-win32
     image: cobalt-build-win32
 
+  xb1:
+    <<: *common-definitions
+    environment:
+      <<: *shared-build-env
+      PLATFORM: xb1
+      COBALT_CONCURRENT_LINKS: ${COBALT_CONCURRENT_LINKS:-2}
+    image: cobalt-build-xb1
+    depends_on:
+      - build-xb1
+
   runner-win-win32:
     <<: *common-definitions
     build:
@@ -122,6 +143,19 @@ services:
       dockerfile: ./Dockerfile
       args:
         - RUNNER_VERSION=2.294.0
+        - FROM_IMAGE=cobalt-build-win-win32
     depends_on:
       - cobalt-build-win32-base
     image: cobalt-runner-win-win32
+
+  runner-xb1:
+    <<: *common-definitions
+    build:
+      context: ./docker/windows/runner
+      dockerfile: ./Dockerfile
+      args:
+        - RUNNER_VERSION=2.294.0
+        - FROM_IMAGE=cobalt-build-xb1
+    depends_on:
+      - xb1
+    image: cobalt-runner-xb1
diff --git a/docker/windows/runner/Dockerfile b/docker/windows/runner/Dockerfile
index a49481150bbd..b8aa4ad10507 100644
--- a/docker/windows/runner/Dockerfile
+++ b/docker/windows/runner/Dockerfile
@@ -11,7 +11,8 @@
 # WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 # See the License for the specific language governing permissions and
 # limitations under the License.
-FROM cobalt-build-win32-base
+ARG FROM_IMAGE
+FROM ${FROM_IMAGE}
 
 SHELL ["powershell", "-Command", "$ErrorActionPreference = 'Stop';$ProgressPreference='silentlyContinue';"]
 
@@ -20,7 +21,7 @@ ARG RUNNER_VERSION
 RUN Invoke-WebRequest -Uri 'https://aka.ms/install-powershell.ps1' -OutFile install-powershell.ps1; \
     powershell -ExecutionPolicy Unrestricted -File ./install-powershell.ps1 -AddToPath
 
-RUN Invoke-WebRequest -Uri https://github.com/actions/runner/releases/download/v$env:RUNNER_VERSION/actions-runner-win-x64-$env:RUNNER_VERSION.zip -OutFile runner.zip; \
+RUN Invoke-WebRequest -Uri https://github.com/actions/runner/releases/download/v$env:RUNNER_VERSION/actions-runner-win-x64-$env:RUNNER_VERSION.zip -OutFile C:/runner.zip; \
     Expand-Archive -Path C:/runner.zip -DestinationPath C:/actions-runner; \
     Remove-Item -Path C:\runner.zip; \
     setx /M PATH $(${Env:PATH} + \";${Env:ProgramFiles}\Git\bin\")
@@ -31,4 +32,4 @@ RUN choco install -f -y 7zip --version=19.0
 ENV TMP "C:\Users\ContainerAdministrator\AppData\Local\Temp2"
 
 ADD runner.ps1 C:/runner.ps1
-CMD ["pwsh", "-ExecutionPolicy", "Unrestricted", "-File", ".\\runner.ps1"]
+CMD ["pwsh", "-ExecutionPolicy", "Unrestricted", "-File", "C:\\runner.ps1"]
diff --git a/docker/windows/runner/runner.ps1 b/docker/windows/runner/runner.ps1
index 9e96a5e58174..fa4fb5c7922c 100644
--- a/docker/windows/runner/runner.ps1
+++ b/docker/windows/runner/runner.ps1
@@ -1,2 +1,2 @@
-.\actions-runner\config.cmd --unattended --replace --url https://github.com/${env:RUNNER_REPO} --token $env:RUNNER_TOKEN --name $env:RUNNER_NAME --work $env:RUNNER_WORKDIR --labels $env:RUNNER_LABELS;
-.\actions-runner\run.cmd;
+C:\actions-runner\config.cmd --unattended --replace --url https://github.com/${env:RUNNER_REPO} --token $env:RUNNER_TOKEN --name $env:RUNNER_NAME --work $env:RUNNER_WORKDIR --labels $env:RUNNER_LABELS;
+C:\actions-runner\run.cmd;
diff --git a/docker/windows/xb1/Dockerfile b/docker/windows/xb1/Dockerfile
new file mode 100644
index 000000000000..e4a7fd55c9ad
--- /dev/null
+++ b/docker/windows/xb1/Dockerfile
@@ -0,0 +1,50 @@
+# escape=`
+
+# Copyright 2021 The Cobalt Authors. All Rights Reserved.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+ARG FROM_IMAGE
+FROM ${FROM_IMAGE}
+
+SHELL ["powershell", "-ExecutionPolicy", "Unrestricted", "-Command", `
+       "$ErrorActionPreference = 'Stop'; $ProgressPreference = 'SilentlyContinue';"]
+
+# Note: Visual Studio is installed as part of cobalt-build-win-base
+
+# Windows SDK
+RUN Invoke-WebRequest -Uri https://go.microsoft.com/fwlink/p/?linkid=2173743 `
+    -OutFile C:\win_sdk_installer.exe ; `
+    Write-Host 'Installing win_sdk_installer.exe ...' ; `
+    C:\win_sdk_installer.exe /ceip off /quiet /features + | Out-Null ; `
+    Write-Host 'Install of win_sdk_installer.exe completed. Cleaning up ...' ; `
+    Remove-Item -Force -Recurse $env:TEMP\* ; `
+    Remove-Item C:\win_sdk_installer.exe
+
+# MSVC sdk
+ARG vs_buildtools_version="15"
+ARG windows_11_sdk_version="22000"
+RUN Write-Host 'Downloading vs_buildtools.exe' ; `
+    Invoke-WebRequest -Uri https://aka.ms/vs/${env:vs_buildtools_version}/release/vs_buildtools.exe `
+                      -OutFile C:\vs_buildtools.exe ; `
+    Write-Host 'Installing vs_buildtools.exe ...' ;`
+    Start-Process -Wait -FilePath C:\vs_buildtools.exe -ArgumentList "--quiet","--wait","--norestart","--nocache","--installPath","C:\BuildTools","--add","Microsoft.VisualStudio.Component.Windows11SDK.${env:windows_11_sdk_version}","--add","Microsoft.VisualStudio.Component.VC.Redist.14.Latest" ; `
+    Write-Host 'Install of vs_buildtools.exe completed. Cleaning up ...' ; `
+    Remove-Item C:\vs_buildtools.exe
+
+
+WORKDIR "C:\code"
+
+CMD python3 cobalt/build/gn.py -p $env:PLATFORM -c $env:CONFIG out/${env:PLATFORM}_${env:CONFIG};`
+    if ($?) {`
+      ninja $env:NINJA_FLAGS -C out/${env:PLATFORM}_$env:CONFIG $env:TARGET;`
+    }