diff --git a/eng/pipelines/common/global-build-job.yml b/eng/pipelines/common/global-build-job.yml
index 126cecfacaf05b..2b4b08a9d80784 100644
--- a/eng/pipelines/common/global-build-job.yml
+++ b/eng/pipelines/common/global-build-job.yml
@@ -19,6 +19,7 @@ parameters:
   shouldContinueOnError: false
   dependOnEvaluatePaths: false
   isOfficialBuild: false
+  buildingOnSourceBuildImage: false
   runtimeFlavor: 'coreclr'
   helixQueues: ''
   enablePublishTestResults: false
@@ -51,7 +52,7 @@ jobs:
       dependsOn: ${{ parameters.dependsOn }}
 
     ${{ if eq(parameters.dependOnEvaluatePaths, true) }}:
-      dependsOn: 
+      dependsOn:
       - evaluate_paths
       - ${{ if ne(parameters.dependsOn,'') }}:
         - ${{ parameters.dependsOn }}
@@ -59,7 +60,7 @@ jobs:
     variables:
       - name: _osParameter
         value: -os ${{ parameters.osGroup }}
-      
+
       - ${{ if and(eq(parameters.osGroup, 'Linux'), eq(parameters.osSubGroup, '_musl')) }}:
         - name: _osParameter
           value: /p:RuntimeOS=linux-musl /p:OutputRid=linux-musl-${{ parameters.archType }}
@@ -79,13 +80,20 @@ jobs:
           value: /p:OfficialBuildId=$(Build.BuildNumber)
         ${{ if ne(parameters.isOfficialBuild, true) }}:
           value: ''
-      
+
       - name: _richCodeNavigationParam
         ${{ if eq(parameters.enableRichCodeNavigation, true) }}:
           value: /p:EnableRichCodeNavigation=true
         ${{ if ne(parameters.enableRichCodeNavigation, true) }}:
           value: ''
 
+      - name: _sclEnableCommand
+        ${{ if eq(parameters.buildingOnSourceBuildImage, true) }}:
+          value: scl enable llvm-toolset-7.0 --
+        ${{ if ne(parameters.buildingOnSourceBuildImage, true) }}:
+          value: ''
+
+
       - ${{ each variable in parameters.variables }}:
         - ${{ variable }}
 
@@ -124,7 +132,7 @@ jobs:
         displayName: Install native dependencies
 
     # Build
-    - script: $(Build.SourcesDirectory)$(dir)build$(scriptExt) -ci -arch ${{ parameters.archType }} $(_osParameter) ${{ parameters.buildArgs }} $(_officialBuildParameter) $(_crossBuildPropertyArg) $(_cxx11Parameter) $(_richCodeNavigationParam)
+    - script: $(_sclEnableCommand) $(Build.SourcesDirectory)$(dir)build$(scriptExt) -ci -arch ${{ parameters.archType }} $(_osParameter) ${{ parameters.buildArgs }} $(_officialBuildParameter) $(_crossBuildPropertyArg) $(_cxx11Parameter) $(_richCodeNavigationParam)
       displayName: Build product
       ${{ if eq(parameters.useContinueOnErrorDuringBuild, true) }}:
         continueOnError: ${{ parameters.shouldContinueOnError }}
diff --git a/eng/pipelines/common/platform-matrix.yml b/eng/pipelines/common/platform-matrix.yml
index 000d1dcecdfdac..ea17c5643461f3 100644
--- a/eng/pipelines/common/platform-matrix.yml
+++ b/eng/pipelines/common/platform-matrix.yml
@@ -180,6 +180,31 @@ jobs:
         helixQueueGroup: ${{ parameters.helixQueueGroup }}
         ${{ insert }}: ${{ parameters.jobParameters }}
 
+# Linux x64 Source Build
+
+- ${{ if containsValue(parameters.platforms, 'SourceBuild_Linux_x64') }}:
+  - template: xplat-setup.yml
+    parameters:
+      jobTemplate: ${{ parameters.jobTemplate }}
+      helixQueuesTemplate: ${{ parameters.helixQueuesTemplate }}
+      variables: ${{ parameters.variables }}
+      osGroup: Linux
+      archType: x64
+      targetRid: linux-x64
+      platform: Linux_x64
+      container:
+        image: centos-7-source-build-20210408124356-5d87b80
+        registry: mcr
+      jobParameters:
+        runtimeFlavor: ${{ parameters.runtimeFlavor }}
+        stagedBuild: ${{ parameters.stagedBuild }}
+        buildConfig: ${{ parameters.buildConfig }}
+        ${{ if eq(parameters.passPlatforms, true) }}:
+          platforms: ${{ parameters.platforms }}
+        helixQueueGroup: ${{ parameters.helixQueueGroup }}
+        ${{ insert }}: ${{ parameters.jobParameters }}
+        buildingOnSourceBuildImage: true
+
 # WebAssembly
 
 - ${{ if containsValue(parameters.platforms, 'Browser_wasm') }}:
diff --git a/eng/pipelines/global-build.yml b/eng/pipelines/global-build.yml
index 3a737e69c52131..b415c5e5cac57b 100644
--- a/eng/pipelines/global-build.yml
+++ b/eng/pipelines/global-build.yml
@@ -130,8 +130,8 @@ jobs:
     jobTemplate: /eng/pipelines/common/global-build-job.yml
     buildConfig: release
     platforms:
-    - Linux_x64
+    - SourceBuild_Linux_x64
     jobParameters:
       nameSuffix: SourceBuild
-      buildArgs: /p:DotNetBuildFromSource=true
+      buildArgs: -subset clr+libs+host+packs /p:DotNetBuildFromSource=true
       timeoutInMinutes: 90