diff --git a/scripts/vsts-prebuild.ps1 b/scripts/vsts-prebuild.ps1
index 9fe4025d54..b0bde0c730 100644
--- a/scripts/vsts-prebuild.ps1
+++ b/scripts/vsts-prebuild.ps1
@@ -43,3 +43,7 @@ Write-Host "##vso[task.setvariable variable=JsonNetVersion;]$JsonNetVersion"
 $microsoftFakesVersion = ([xml](Get-Content $TP_ROOT_DIR\scripts\build\TestPlatform.Dependencies.props)).Project.PropertyGroup.MicrosoftFakesVersion
 $FakesPackageDir = Join-Path $TP_ROOT_DIR "packages\Microsoft.QualityTools.Testing.Fakes.TestRunnerHarness\$microsoftFakesVersion\contentFiles"
 Write-Host "##vso[task.setvariable variable=FakesPackageDir;]$FakesPackageDir"
+
+$codeCoverageExternalsVersion = ([xml](Get-Content $TP_ROOT_DIR\scripts\build\TestPlatform.Dependencies.props)).Project.PropertyGroup.CodeCoverageExternalsVersion
+$TraceDataCollectorPackagesDir = Join-Path $TP_ROOT_DIR "packages\microsoft.visualstudio.tracedatacollector\$codeCoverageExternalsVersion\lib"
+Write-Host "##vso[task.setvariable variable=TraceDataCollectorPackagesDir;]$TraceDataCollectorPackagesDir"
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