diff --git a/.vsts-ci.yml b/.vsts-ci.yml
index 89b59ca95..59526b0ca 100644
--- a/.vsts-ci.yml
+++ b/.vsts-ci.yml
@@ -373,12 +373,11 @@ stages:
 # the VMR synchronization step is run to validate that the PR can be merged and later
 # synchronized into the VMR without problems.
 # You can do this by allowing the Synchronize_VMR stage from above in PRs.
-# TODO - Temporarily disabled (https://github.com/dotnet/source-build/issues/3184)
-# - ${{ if eq(variables['Build.Reason'], 'PullRequest') }}:
-#   - template: eng/pipelines/templates/stages/vmr-build.yml
-#     parameters:
-#       vmrBranch: ${{ parameters.vmrBranch }}
-#       isBuiltFromVmr: false
+- ${{ if eq(variables['Build.Reason'], 'PullRequest') }}:
+  - template: eng/pipelines/templates/stages/vmr-build.yml
+    parameters:
+      vmrBranch: ${{ parameters.vmrBranch }}
+      isBuiltFromVmr: false
 
 - ${{ if and(ne(variables['System.TeamProject'], 'public'), notin(variables['Build.Reason'], 'PullRequest')) }}:
   - stage: Publish
diff --git a/src/SourceBuild/content/build.sh b/src/SourceBuild/content/build.sh
old mode 100644
new mode 100755
diff --git a/src/SourceBuild/content/eng/install-nuget-credprovider.sh b/src/SourceBuild/content/eng/install-nuget-credprovider.sh
old mode 100644
new mode 100755
diff --git a/src/SourceBuild/content/prep.sh b/src/SourceBuild/content/prep.sh
old mode 100644
new mode 100755
diff --git a/src/SourceBuild/content/prereqs/packages/archive/_ b/src/SourceBuild/content/prereqs/packages/archive/_
new file mode 100644
index 000000000..e69de29bb
diff --git a/src/SourceBuild/content/prereqs/packages/prebuilt/_ b/src/SourceBuild/content/prereqs/packages/prebuilt/_
new file mode 100644
index 000000000..e69de29bb