diff --git a/eng/common/pipelines/templates/steps/set-vcpkg-cache-vars.yml b/eng/common/pipelines/templates/steps/set-vcpkg-cache-vars.yml
index c7ece396e0..7827494c5c 100644
--- a/eng/common/pipelines/templates/steps/set-vcpkg-cache-vars.yml
+++ b/eng/common/pipelines/templates/steps/set-vcpkg-cache-vars.yml
@@ -6,9 +6,10 @@ parameters:
 
 steps:
   - pwsh: |
-      Write-Host "Setting vcpkg cache variables for read only access to vcpkg binary and asset caches"
+      Write-Host "Setting vcpkg cache variables for read only access to the vcpkg binary cache"
       Write-Host '##vso[task.setvariable variable=VCPKG_BINARY_SOURCES_SECRET;issecret=true;]clear;x-azcopy,https://azuresdkartifacts.blob.core.windows.net/public-vcpkg-container,read'
-      Write-Host '##vso[task.setvariable variable=X_VCPKG_ASSET_SOURCES_SECRET;issecret=true;]clear;x-azurl,https://azuresdkartifacts.blob.core.windows.net/public-vcpkg-container,,read'
+      Write-Host "Setting Terrapin asset source for read only access to the vcpkg source mirror"
+      Write-Host '##vso[task.setvariable variable=X_VCPKG_ASSET_SOURCES]clear;x-azurl,https://vcpkg.storage.devpackages.microsoft.io/artifacts/;x-block-origin'
     displayName: Set vcpkg variables
 
   - ${{if eq(variables['System.TeamProject'], 'internal') }}:
diff --git a/eng/common/scripts/Set-VcpkgWriteModeCache.ps1 b/eng/common/scripts/Set-VcpkgWriteModeCache.ps1
index 37bca90019..27bdef477d 100755
--- a/eng/common/scripts/Set-VcpkgWriteModeCache.ps1
+++ b/eng/common/scripts/Set-VcpkgWriteModeCache.ps1
@@ -20,4 +20,3 @@ Write-Host "##vso[task.setvariable variable=VCPKG_BINARY_SAS_TOKEN;issecret=true
 
 Write-Host "Setting vcpkg binary cache to read and write"
 Write-Host "##vso[task.setvariable variable=VCPKG_BINARY_SOURCES_SECRET;issecret=true;]clear;x-azcopy-sas,https://$StorageAccountName.blob.core.windows.net/$StorageContainerName,$vcpkgBinarySourceSas,readwrite"
-Write-Host "##vso[task.setvariable variable=X_VCPKG_ASSET_SOURCES_SECRET;issecret=true;]clear;x-azurl,https://$StorageAccountName.blob.core.windows.net/$StorageContainerName,$vcpkgBinarySourceSas,readwrite"