diff --git a/eng/common/templates/steps/source-build.yml b/eng/common/templates/steps/source-build.yml
index ba40dc82f1411..f24d6c231abcb 100644
--- a/eng/common/templates/steps/source-build.yml
+++ b/eng/common/templates/steps/source-build.yml
@@ -68,7 +68,7 @@ steps:
       publishArgs='--publish'
     fi
 
-    ${{ coalesce(parameters.platform.buildScript, './build.sh') }} --ci \
+    ${{ coalesce(parameters.platform.buildScript, 'scl enable llvm-toolset-7.0 -- ./build.sh') }} --ci \
       --configuration $buildConfig \
       --restore --build --pack $publishArgs -bl \
       $officialBuildArgs \
diff --git a/eng/pipelines/common/global-build-job.yml b/eng/pipelines/common/global-build-job.yml
index 84f1786bd2171..9d5e5ab1d7358 100644
--- a/eng/pipelines/common/global-build-job.yml
+++ b/eng/pipelines/common/global-build-job.yml
@@ -119,6 +119,9 @@ jobs:
         inputs:
           artifact: Mono_Offsets_${{monoCrossAOTTargetOS}}
           path: '$(Build.SourcesDirectory)/artifacts/obj/mono/offsetfiles'
+    
+    - ${{ if eq(parameters.buildingOnSourceBuildImage, true) }}:
+      - template: /eng/common/templates/steps/source-build.yml
 
     - ${{ if in(parameters.osGroup, 'OSX', 'iOS', 'tvOS', 'MacCatalyst') }}:
       - script: $(Build.SourcesDirectory)/eng/install-native-dependencies.sh ${{ parameters.osGroup }} ${{ parameters.archType }} azDO
@@ -140,10 +143,11 @@ jobs:
         displayName: Install native dependencies
 
     # Build
-    - script: $(_sclEnableCommand) $(Build.SourcesDirectory)$(dir)build$(scriptExt) -ci -arch ${{ parameters.archType }} $(_osParameter) ${{ parameters.buildArgs }} $(_officialBuildParameter) $(_crossBuildPropertyArg) $(_cxx11Parameter) $(_richCodeNavigationParam) $(_buildDarwinFrameworksParameter)
-      displayName: Build product
-      ${{ if eq(parameters.useContinueOnErrorDuringBuild, true) }}:
-        continueOnError: ${{ parameters.shouldContinueOnError }}
+    - ${{ if eq(parameters.buildingOnSourceBuildImage, false) }}:
+      - script: $(_sclEnableCommand) $(Build.SourcesDirectory)$(dir)build$(scriptExt) -ci -arch ${{ parameters.archType }} $(_osParameter) ${{ parameters.buildArgs }} $(_officialBuildParameter) $(_crossBuildPropertyArg) $(_cxx11Parameter) $(_richCodeNavigationParam) $(_buildDarwinFrameworksParameter)
+        displayName: Build product
+        ${{ if eq(parameters.useContinueOnErrorDuringBuild, true) }}:
+          continueOnError: ${{ parameters.shouldContinueOnError }}
 
     - ${{ if in(parameters.osGroup, 'OSX', 'iOS', 'tvOS', 'Android') }}:
       - script: |
diff --git a/eng/pipelines/global-build.yml b/eng/pipelines/global-build.yml
index 289f7d0033e9c..a9714fdb76678 100644
--- a/eng/pipelines/global-build.yml
+++ b/eng/pipelines/global-build.yml
@@ -128,10 +128,10 @@ jobs:
 - template: /eng/pipelines/common/platform-matrix.yml
   parameters:
     jobTemplate: /eng/pipelines/common/global-build-job.yml
+    buildingOnSourceBuildImage: true
     buildConfig: release
     platforms:
     - SourceBuild_Linux_x64
     jobParameters:
       nameSuffix: SourceBuild
-      buildArgs: -subset clr+libs+host+packs /p:DotNetBuildFromSource=true --portableBuild false
       timeoutInMinutes: 90