dotnet · premun · Sep 5, 2025 · Sep 5, 2025 · Sep 5, 2025 · Sep 5, 2025
diff --git a/Directory.Build.props b/Directory.Build.props
@@ -108,6 +108,9 @@
 
     <HostFxrVersion>$(MicrosoftNETCoreAppRuntimePackageVersion)</HostFxrVersion>
     <SharedHostVersion>$(MicrosoftNETCoreAppRuntimePackageVersion)</SharedHostVersion>
+
+    <MicrosoftCodeAnalysisVersionForNetAnalyzers Condition="'$(DotNetBuildSourceOnly)' != 'true'">3.11.0</MicrosoftCodeAnalysisVersionForNetAnalyzers>
+    <MicrosoftCodeAnalysisVersionForNetAnalyzers Condition="'$(DotNetBuildSourceOnly)' == 'true'">$(MicrosoftCodeAnalysisVersion)</MicrosoftCodeAnalysisVersionForNetAnalyzers>
   </PropertyGroup>
 
   <Import Project="build/GenerateResxSource.targets" />

diff --git a/eng/Version.Details.props b/eng/Version.Details.props
diff --git a/eng/Version.Details.xml b/eng/Version.Details.xml
diff --git a/eng/Versions.props b/eng/Versions.props
@@ -65,8 +65,6 @@
     <SystemCommandLineVersion>2.0.0-rc.1.25377.103</SystemCommandLineVersion>
     <SystemCommandLineNamingConventionBinderVersion>2.0.0-beta5.25279.2</SystemCommandLineNamingConventionBinderVersion>
     <MicrosoftCodeAnalysisAnalyzerTestingVersion>1.1.2</MicrosoftCodeAnalysisAnalyzerTestingVersion>
-    <MicrosoftCodeAnalysisVersionForNetAnalyzers Condition="'$(DotNetBuildSourceOnly)' != 'true'">3.11.0</MicrosoftCodeAnalysisVersionForNetAnalyzers>
-    <MicrosoftCodeAnalysisVersionForNetAnalyzers Condition="'$(DotNetBuildSourceOnly)' == 'true'">$(MicrosoftCodeAnalysisVersion)</MicrosoftCodeAnalysisVersionForNetAnalyzers>
     <MicrosoftVisualBasicVersion>10.3.0</MicrosoftVisualBasicVersion>
     <MicrosoftVisualStudioSetupConfigurationInteropVersion>3.2.2146</MicrosoftVisualStudioSetupConfigurationInteropVersion>
     <MicrosoftWindowsCsWin32PackageVersion>0.3.49-beta</MicrosoftWindowsCsWin32PackageVersion>

diff --git a/eng/common/SetupNugetSources.ps1 b/eng/common/SetupNugetSources.ps1
@@ -10,8 +10,8 @@
 #    displayName: Setup Private Feeds Credentials
 #    condition: eq(variables['Agent.OS'], 'Windows_NT')
 #    inputs:
-#      filePath: $(Build.SourcesDirectory)/eng/common/SetupNugetSources.ps1
-#      arguments: -ConfigFile $(Build.SourcesDirectory)/NuGet.config -Password $Env:Token
+#      filePath: $(System.DefaultWorkingDirectory)/eng/common/SetupNugetSources.ps1
+#      arguments: -ConfigFile $(System.DefaultWorkingDirectory)/NuGet.config -Password $Env:Token
 #    env:
 #      Token: $(dn-bot-dnceng-artifact-feeds-rw)
 #

diff --git a/eng/common/SetupNugetSources.sh b/eng/common/SetupNugetSources.sh
@@ -11,8 +11,8 @@
 #  - task: Bash@3
 #    displayName: Setup Internal Feeds
 #    inputs:
-#      filePath: $(Build.SourcesDirectory)/eng/common/SetupNugetSources.sh
-#      arguments: $(Build.SourcesDirectory)/NuGet.config
+#      filePath: $(System.DefaultWorkingDirectory)/eng/common/SetupNugetSources.sh
+#      arguments: $(System.DefaultWorkingDirectory)/NuGet.config
 #    condition: ne(variables['Agent.OS'], 'Windows_NT')
 #  - task: NuGetAuthenticate@1
 #

diff --git a/eng/common/core-templates/job/job.yml b/eng/common/core-templates/job/job.yml
@@ -163,7 +163,7 @@ jobs:
       inputs:
         testResultsFormat: 'xUnit'
         testResultsFiles: '*.xml'
-        searchFolder: '$(Build.SourcesDirectory)/artifacts/TestResults/$(_BuildConfig)'
+        searchFolder: '$(System.DefaultWorkingDirectory)/artifacts/TestResults/$(_BuildConfig)'
         testRunTitle: ${{ coalesce(parameters.testRunTitle, parameters.name, '$(System.JobName)') }}-xunit
         mergeTestResults: ${{ parameters.mergeTestResults }}
       continueOnError: true
@@ -174,7 +174,7 @@ jobs:
       inputs:
         testResultsFormat: 'VSTest'
         testResultsFiles: '*.trx'
-        searchFolder: '$(Build.SourcesDirectory)/artifacts/TestResults/$(_BuildConfig)'
+        searchFolder: '$(System.DefaultWorkingDirectory)/artifacts/TestResults/$(_BuildConfig)'
         testRunTitle: ${{ coalesce(parameters.testRunTitle, parameters.name, '$(System.JobName)') }}-trx
         mergeTestResults: ${{ parameters.mergeTestResults }}
       continueOnError: true
@@ -218,7 +218,7 @@ jobs:
     - task: CopyFiles@2
       displayName: Gather buildconfiguration for build retry
       inputs:
-        SourceFolder: '$(Build.SourcesDirectory)/eng/common/BuildConfiguration'
+        SourceFolder: '$(System.DefaultWorkingDirectory)/eng/common/BuildConfiguration'
         Contents: '**'
         TargetFolder: '$(Build.ArtifactStagingDirectory)/eng/common/BuildConfiguration'
       continueOnError: true

diff --git a/eng/common/core-templates/job/onelocbuild.yml b/eng/common/core-templates/job/onelocbuild.yml
@@ -8,7 +8,7 @@ parameters:
   CeapexPat: $(dn-bot-ceapex-package-r) # PAT for the loc AzDO instance https://dev.azure.com/ceapex
   GithubPat: $(BotAccount-dotnet-bot-repo-PAT)
 
-  SourcesDirectory: $(Build.SourcesDirectory)
+  SourcesDirectory: $(System.DefaultWorkingDirectory)
   CreatePr: true
   AutoCompletePr: false
   ReusePr: true
@@ -68,7 +68,7 @@ jobs:
     - ${{ if ne(parameters.SkipLocProjectJsonGeneration, 'true') }}:
       - task: Powershell@2
         inputs:
-          filePath: $(Build.SourcesDirectory)/eng/common/generate-locproject.ps1
+          filePath: $(System.DefaultWorkingDirectory)/eng/common/generate-locproject.ps1
           arguments: $(_GenerateLocProjectArguments)
         displayName: Generate LocProject.json
         condition: ${{ parameters.condition }}
@@ -103,7 +103,7 @@ jobs:
     - task: CopyFiles@2
       displayName: Copy LocProject.json
       inputs:
-        SourceFolder: '$(Build.SourcesDirectory)/eng/Localize/'
+        SourceFolder: '$(System.DefaultWorkingDirectory)/eng/Localize/'
         Contents: 'LocProject.json'
         TargetFolder: '$(Build.ArtifactStagingDirectory)/loc'
       condition: ${{ parameters.condition }}

diff --git a/eng/common/core-templates/job/publish-build-assets.yml b/eng/common/core-templates/job/publish-build-assets.yml
@@ -38,6 +38,8 @@ parameters:
   # Optional: A minimatch pattern for the asset manifests to publish to BAR
   assetManifestsPattern: '*/manifests/**/*.xml'
 
+  repositoryAlias: self
+
 jobs:
 - job: Asset_Registry_Publish
 
@@ -78,7 +80,7 @@ jobs:
     - 'Illegal entry point, is1ESPipeline is not defined. Repository yaml should not directly reference templates in core-templates folder.': error
 
   - ${{ if and(eq(parameters.runAsPublic, 'false'), ne(variables['System.TeamProject'], 'public'), notin(variables['Build.Reason'], 'PullRequest')) }}:
-    - checkout: self
+    - checkout: ${{ parameters.repositoryAlias }}
       fetchDepth: 3
       clean: true
 
@@ -117,7 +119,7 @@ jobs:
         azureSubscription: "Darc: Maestro Production"
         scriptType: ps
         scriptLocation: scriptPath
-        scriptPath: $(Build.SourcesDirectory)/eng/common/sdk-task.ps1
+        scriptPath: $(System.DefaultWorkingDirectory)/eng/common/sdk-task.ps1
         arguments: -task PublishBuildAssets -restore -msbuildEngine dotnet
           /p:ManifestsPath='$(Build.StagingDirectory)/AssetManifests'
           /p:IsAssetlessBuild=${{ parameters.isAssetlessBuild }}
@@ -137,7 +139,7 @@ jobs:
           Add-Content -Path $filePath -Value "$(DefaultChannels)"
           Add-Content -Path $filePath -Value $(IsStableBuild)
 
-          $symbolExclusionfile = "$(Build.SourcesDirectory)/eng/SymbolPublishingExclusionsFile.txt"
+          $symbolExclusionfile = "$(System.DefaultWorkingDirectory)/eng/SymbolPublishingExclusionsFile.txt"
           if (Test-Path -Path $symbolExclusionfile)
           {
             Write-Host "SymbolExclusionFile exists"
@@ -177,7 +179,7 @@ jobs:
           azureSubscription: "Darc: Maestro Production"
           scriptType: ps
           scriptLocation: scriptPath
-          scriptPath: $(Build.SourcesDirectory)/eng/common/post-build/publish-using-darc.ps1
+          scriptPath: $(System.DefaultWorkingDirectory)/eng/common/post-build/publish-using-darc.ps1
           arguments: >
             -BuildId $(BARBuildId)
             -PublishingInfraVersion 3

diff --git a/eng/common/core-templates/jobs/codeql-build.yml b/eng/common/core-templates/jobs/codeql-build.yml
@@ -24,7 +24,7 @@ jobs:
       - name: DefaultGuardianVersion
         value: 0.109.0
       - name: GuardianPackagesConfigFile
-        value: $(Build.SourcesDirectory)\eng\common\sdl\packages.config
+        value: $(System.DefaultWorkingDirectory)\eng\common\sdl\packages.config
       - name: GuardianVersion
         value: ${{ coalesce(parameters.overrideGuardianVersion, '$(DefaultGuardianVersion)') }}
 

diff --git a/eng/common/core-templates/jobs/jobs.yml b/eng/common/core-templates/jobs/jobs.yml
@@ -43,6 +43,7 @@ parameters:
 
   artifacts: {}
   is1ESPipeline: ''
+  repositoryAlias: self
 
 # Internal resources (telemetry, microbuild) can only be accessed from non-public projects,
 # and some (Microbuild) should only be applied to non-PR cases for internal builds.
@@ -114,3 +115,4 @@ jobs:
         enablePublishBuildArtifacts: ${{ parameters.enablePublishBuildArtifacts }}
         artifactsPublishingAdditionalParameters: ${{ parameters.artifactsPublishingAdditionalParameters }}
         signingValidationAdditionalParameters: ${{ parameters.signingValidationAdditionalParameters }}
+        repositoryAlias: ${{ parameters.repositoryAlias }}
diff --git a/eng/common/core-templates/post-build/post-build.yml b/eng/common/core-templates/post-build/post-build.yml
@@ -154,7 +154,7 @@ stages:
         - task: PowerShell@2
           displayName: Validate
           inputs:
-            filePath: $(Build.SourcesDirectory)/eng/common/post-build/nuget-validation.ps1
+            filePath: $(System.DefaultWorkingDirectory)/eng/common/post-build/nuget-validation.ps1
             arguments: -PackagesPath $(Build.ArtifactStagingDirectory)/PackageArtifacts/
 
     - job:
@@ -208,7 +208,7 @@ stages:
             filePath: eng\common\sdk-task.ps1
             arguments: -task SigningValidation -restore -msbuildEngine vs
               /p:PackageBasePath='$(Build.ArtifactStagingDirectory)/PackageArtifacts'
-              /p:SignCheckExclusionsFile='$(Build.SourcesDirectory)/eng/SignCheckExclusionsFile.txt'
+              /p:SignCheckExclusionsFile='$(System.DefaultWorkingDirectory)/eng/SignCheckExclusionsFile.txt'
               ${{ parameters.signingValidationAdditionalParameters }}
 
         - template: /eng/common/core-templates/steps/publish-logs.yml
@@ -258,7 +258,7 @@ stages:
         - task: PowerShell@2
           displayName: Validate
           inputs:
-            filePath: $(Build.SourcesDirectory)/eng/common/post-build/sourcelink-validation.ps1
+            filePath: $(System.DefaultWorkingDirectory)/eng/common/post-build/sourcelink-validation.ps1
             arguments: -InputPath $(Build.ArtifactStagingDirectory)/BlobArtifacts/ 
               -ExtractPath $(Agent.BuildDirectory)/Extract/ 
               -GHRepoName $(Build.Repository.Name) 
@@ -313,7 +313,7 @@ stages:
             azureSubscription: "Darc: Maestro Production"
             scriptType: ps
             scriptLocation: scriptPath
-            scriptPath: $(Build.SourcesDirectory)/eng/common/post-build/publish-using-darc.ps1
+            scriptPath: $(System.DefaultWorkingDirectory)/eng/common/post-build/publish-using-darc.ps1
             arguments: >
               -BuildId $(BARBuildId)
               -PublishingInfraVersion ${{ parameters.publishingInfraVersion }}

diff --git a/eng/common/core-templates/post-build/setup-maestro-vars.yml b/eng/common/core-templates/post-build/setup-maestro-vars.yml
@@ -36,7 +36,7 @@ steps:
             $AzureDevOpsBuildId = $Env:Build_BuildId
           }
           else {
-            . $(Build.SourcesDirectory)\eng\common\tools.ps1
+            . $(System.DefaultWorkingDirectory)\eng\common\tools.ps1
             $darc = Get-Darc
             $buildInfo = & $darc get-build `
               --id ${{ parameters.BARBuildId }} `

diff --git a/eng/common/core-templates/steps/enable-internal-sources.yml b/eng/common/core-templates/steps/enable-internal-sources.yml
@@ -17,8 +17,8 @@ steps:
     - task: PowerShell@2
       displayName: Setup Internal Feeds
       inputs:
-        filePath: $(Build.SourcesDirectory)/eng/common/SetupNugetSources.ps1
-        arguments: -ConfigFile $(Build.SourcesDirectory)/NuGet.config -Password $Env:Token
+        filePath: $(System.DefaultWorkingDirectory)/eng/common/SetupNugetSources.ps1
+        arguments: -ConfigFile $(System.DefaultWorkingDirectory)/NuGet.config -Password $Env:Token
       env:
         Token: ${{ parameters.legacyCredential }}
   # If running on dnceng (internal project), just use the default behavior for NuGetAuthenticate.
@@ -29,8 +29,8 @@ steps:
       - task: PowerShell@2
         displayName: Setup Internal Feeds
         inputs:
-          filePath: $(Build.SourcesDirectory)/eng/common/SetupNugetSources.ps1
-          arguments: -ConfigFile $(Build.SourcesDirectory)/NuGet.config
+          filePath: $(System.DefaultWorkingDirectory)/eng/common/SetupNugetSources.ps1
+          arguments: -ConfigFile $(System.DefaultWorkingDirectory)/NuGet.config
     - ${{ else }}:
       - template: /eng/common/templates/steps/get-federated-access-token.yml
         parameters:
@@ -39,8 +39,8 @@ steps:
       - task: PowerShell@2
         displayName: Setup Internal Feeds
         inputs:
-          filePath: $(Build.SourcesDirectory)/eng/common/SetupNugetSources.ps1
-          arguments: -ConfigFile $(Build.SourcesDirectory)/NuGet.config -Password $(dnceng-artifacts-feeds-read-access-token)
+          filePath: $(System.DefaultWorkingDirectory)/eng/common/SetupNugetSources.ps1
+          arguments: -ConfigFile $(System.DefaultWorkingDirectory)/NuGet.config -Password $(dnceng-artifacts-feeds-read-access-token)
   # This is required in certain scenarios to install the ADO credential provider.
   # It installed by default in some msbuild invocations (e.g. VS msbuild), but needs to be installed for others
   # (e.g. dotnet msbuild).

diff --git a/eng/common/core-templates/steps/generate-sbom.yml b/eng/common/core-templates/steps/generate-sbom.yml
@@ -5,8 +5,8 @@
 # IgnoreDirectories - Directories to ignore for SBOM generation. This will be passed through to the CG component detector.
 
 parameters:
-  PackageVersion: 10.0.0
-  BuildDropPath: '$(Build.SourcesDirectory)/artifacts'
+  PackageVersion: 11.0.0
+  BuildDropPath: '$(System.DefaultWorkingDirectory)/artifacts'
   PackageName: '.NET'
   ManifestDirPath: $(Build.ArtifactStagingDirectory)/sbom
   IgnoreDirectories: ''

diff --git a/eng/common/core-templates/steps/install-microbuild.yml b/eng/common/core-templates/steps/install-microbuild.yml
@@ -12,6 +12,7 @@ parameters:
   # variable is not available in template expression. _SignType has a very large proliferation across .NET, so replacing it is tough.
   microbuildUseESRP: true
   # Location of the MicroBuild output folder
+  # NOTE: There's something that relies on this being in the "default" source directory for tasks such as Signing to work properly.
   microBuildOutputFolder: '$(Build.SourcesDirectory)'
 
   continueOnError: false
@@ -46,17 +47,19 @@ steps:
       displayName: 'Validate ESRP usage (Non-Windows)'
       condition: and(succeeded(), ne(variables['Agent.Os'], 'Windows_NT'))
 
+    # Two different MB install steps. This is due to not being able to use the agent OS during
+    # YAML expansion, and Windows vs. Linux/Mac uses different service connections. However,
+    # we can avoid including the MB install step if not enabled at all. This avoids a bunch of
+    # extra pipeline authorizations, since most pipelines do not sign on non-Windows.
     - task: MicroBuildSigningPlugin@4
-      displayName: Install MicroBuild plugin
+      displayName: Install MicroBuild plugin (Windows)
       inputs:
         signType: $(_SignType)
         zipSources: false
         feedSource: https://dnceng.pkgs.visualstudio.com/_packaging/MicroBuildToolset/nuget/v3/index.json
         ${{ if eq(parameters.microbuildUseESRP, true) }}:
-          ${{ if eq(parameters.enableMicrobuildForMacAndLinux, 'true') }}:
-            azureSubscription: 'MicroBuild Signing Task (DevDiv)'
-            useEsrpCli: true
-          ${{ elseif eq(variables['System.TeamProject'], 'DevDiv') }}:
+          ConnectedServiceName: 'MicroBuild Signing Task (DevDiv)'
+          ${{ if eq(variables['System.TeamProject'], 'DevDiv') }}:
             ConnectedPMEServiceName: 6cc74545-d7b9-4050-9dfa-ebefcc8961ea
           ${{ else }}:
             ConnectedPMEServiceName: 248d384a-b39b-46e3-8ad5-c2c210d5e7ca
@@ -65,16 +68,24 @@ steps:
         MicroBuildOutputFolderOverride: ${{ parameters.microBuildOutputFolder }}
         SYSTEM_ACCESSTOKEN: $(System.AccessToken)
       continueOnError: ${{ parameters.continueOnError }}
-      condition: and(
-        succeeded(),
-        or(
-          and(
-            eq(variables['Agent.Os'], 'Windows_NT'),
-            in(variables['_SignType'], 'real', 'test')
-          ),
-          and(
-            ${{ eq(parameters.enableMicrobuildForMacAndLinux, true) }},
-            ne(variables['Agent.Os'], 'Windows_NT'),
-            eq(variables['_SignType'], 'real')
-          )
-        ))
+      condition: and(succeeded(), eq(variables['Agent.Os'], 'Windows_NT'), in(variables['_SignType'], 'real', 'test'))
+
+    - ${{ if eq(parameters.enableMicrobuildForMacAndLinux, true) }}:
+      - task: MicroBuildSigningPlugin@4
+        displayName: Install MicroBuild plugin (non-Windows)
+        inputs:
+          signType: $(_SignType)
+          zipSources: false
+          feedSource: https://dnceng.pkgs.visualstudio.com/_packaging/MicroBuildToolset/nuget/v3/index.json
+          ${{ if eq(parameters.microbuildUseESRP, true) }}:
+            ConnectedServiceName: 'MicroBuild Signing Task (DevDiv)'
+            ${{ if eq(variables['System.TeamProject'], 'DevDiv') }}:
+              ConnectedPMEServiceName: beb8cb23-b303-4c95-ab26-9e44bc958d39
+            ${{ else }}:
+              ConnectedPMEServiceName: c24de2a5-cc7a-493d-95e4-8e5ff5cad2bc
+        env:
+          TeamName: $(_TeamName)
+          MicroBuildOutputFolderOverride: ${{ parameters.microBuildOutputFolder }}
+          SYSTEM_ACCESSTOKEN: $(System.AccessToken)
+        continueOnError: ${{ parameters.continueOnError }}
+        condition: and(succeeded(), ne(variables['Agent.Os'], 'Windows_NT'),  eq(variables['_SignType'], 'real'))
diff --git a/eng/common/core-templates/steps/publish-logs.yml b/eng/common/core-templates/steps/publish-logs.yml
@@ -12,22 +12,22 @@ steps:
   inputs:
     targetType: inline
     script: |
-      New-Item -ItemType Directory $(Build.SourcesDirectory)/PostBuildLogs/${{parameters.StageLabel}}/${{parameters.JobLabel}}/
-      Move-Item -Path $(Build.SourcesDirectory)/artifacts/log/Debug/* $(Build.SourcesDirectory)/PostBuildLogs/${{parameters.StageLabel}}/${{parameters.JobLabel}}/
+      New-Item -ItemType Directory $(System.DefaultWorkingDirectory)/PostBuildLogs/${{parameters.StageLabel}}/${{parameters.JobLabel}}/
+      Move-Item -Path $(System.DefaultWorkingDirectory)/artifacts/log/Debug/* $(System.DefaultWorkingDirectory)/PostBuildLogs/${{parameters.StageLabel}}/${{parameters.JobLabel}}/
   continueOnError: true
   condition: always()
 
 - task: PowerShell@2
   displayName: Redact Logs
   inputs:
-    filePath: $(Build.SourcesDirectory)/eng/common/post-build/redact-logs.ps1
+    filePath: $(System.DefaultWorkingDirectory)/eng/common/post-build/redact-logs.ps1
     # For now this needs to have explicit list of all sensitive data. Taken from eng/publishing/v3/publish.yml
-    # Sensitive data can as well be added to $(Build.SourcesDirectory)/eng/BinlogSecretsRedactionFile.txt'
+    # Sensitive data can as well be added to $(System.DefaultWorkingDirectory)/eng/BinlogSecretsRedactionFile.txt'
     #  If the file exists - sensitive data for redaction will be sourced from it
     #  (single entry per line, lines starting with '# ' are considered comments and skipped)
-    arguments: -InputPath '$(Build.SourcesDirectory)/PostBuildLogs' 
+    arguments: -InputPath '$(System.DefaultWorkingDirectory)/PostBuildLogs' 
       -BinlogToolVersion ${{parameters.BinlogToolVersion}}
-      -TokensFilePath '$(Build.SourcesDirectory)/eng/BinlogSecretsRedactionFile.txt'
+      -TokensFilePath '$(System.DefaultWorkingDirectory)/eng/BinlogSecretsRedactionFile.txt'
       '$(publishing-dnceng-devdiv-code-r-build-re)'
       '$(MaestroAccessToken)'
       '$(dn-bot-all-orgs-artifact-feeds-rw)'
@@ -44,7 +44,7 @@ steps:
 - task: CopyFiles@2
   displayName: Gather post build logs
   inputs:
-    SourceFolder: '$(Build.SourcesDirectory)/PostBuildLogs'
+    SourceFolder: '$(System.DefaultWorkingDirectory)/PostBuildLogs'
     Contents: '**'
     TargetFolder: '$(Build.ArtifactStagingDirectory)/PostBuildLogs'
   condition: always()

diff --git a/eng/common/core-templates/steps/source-index-stage1-publish.yml b/eng/common/core-templates/steps/source-index-stage1-publish.yml
@@ -1,6 +1,6 @@
 parameters:
-  sourceIndexUploadPackageVersion: 2.0.0-20250425.2
-  sourceIndexProcessBinlogPackageVersion: 1.0.1-20250515.1
+  sourceIndexUploadPackageVersion: 2.0.0-20250818.1
+  sourceIndexProcessBinlogPackageVersion: 1.0.1-20250818.1
   sourceIndexPackageSource: https://pkgs.dev.azure.com/dnceng/public/_packaging/dotnet-tools/nuget/v3/index.json
   binlogPath: artifacts/log/Debug/Build.binlog
 
@@ -20,7 +20,7 @@ steps:
   # Set working directory to temp directory so 'dotnet' doesn't try to use global.json and use the repo's sdk.
   workingDirectory: $(Agent.TempDirectory)
 
-- script: $(Agent.TempDirectory)/.source-index/tools/BinLogToSln -i ${{parameters.BinlogPath}} -r $(Build.SourcesDirectory) -n $(Build.Repository.Name) -o .source-index/stage1output
+- script: $(Agent.TempDirectory)/.source-index/tools/BinLogToSln -i ${{parameters.BinlogPath}} -r $(System.DefaultWorkingDirectory) -n $(Build.Repository.Name) -o .source-index/stage1output
   displayName: "Source Index: Process Binlog into indexable sln"
 
 - ${{ if and(ne(parameters.runAsPublic, 'true'), ne(variables['System.TeamProject'], 'public'), notin(variables['Build.Reason'], 'PullRequest')) }}: