diff --git a/src/Agent.Worker/Build/BuildJobExtension.cs b/src/Agent.Worker/Build/BuildJobExtension.cs
index cbc1fcecd1..8718b4a9bf 100644
--- a/src/Agent.Worker/Build/BuildJobExtension.cs
+++ b/src/Agent.Worker/Build/BuildJobExtension.cs
@@ -151,6 +151,9 @@ public override void InitializeJobExtension(IExecutionContext executionContext,
                 executionContext.SetVariable(Constants.Variables.Build.RepoId, repoInfo.TriggeringRepository.Id);
             }
 
+            // Repo containing the pipeline.
+            executionContext.SetVariable(Constants.Variables.Build.PipelineRepoName, executionContext.GetVariableValueOrDefault(Constants.Variables.Build.RepoName));
+
             executionContext.SetVariable(Constants.Variables.Build.RepoName, repoInfo.TriggeringRepository.Properties.Get<string>(Pipelines.RepositoryPropertyNames.Name));
             executionContext.SetVariable(Constants.Variables.Build.RepoProvider, ConvertToLegacyRepositoryType(repoInfo.TriggeringRepository.Type));
             executionContext.SetVariable(Constants.Variables.Build.RepoUri, repoInfo.TriggeringRepository.Url?.AbsoluteUri);
diff --git a/src/Microsoft.VisualStudio.Services.Agent/Constants.cs b/src/Microsoft.VisualStudio.Services.Agent/Constants.cs
index bf204ee509..fcc5e2b777 100644
--- a/src/Microsoft.VisualStudio.Services.Agent/Constants.cs
+++ b/src/Microsoft.VisualStudio.Services.Agent/Constants.cs
@@ -373,6 +373,7 @@ public static class Build
                 public static readonly string RepoGitSubmoduleCheckout = "build.repository.git.submodulecheckout";
                 public static readonly string RepoId = "build.repository.id";
                 public static readonly string RepoLocalPath = "build.repository.localpath";
+                public static readonly string PipelineRepoName = "pipeline.repository.name";
                 public static readonly string RepoName = "build.Repository.name";
                 public static readonly string RepoProvider = "build.repository.provider";
                 public static readonly string RepoTfvcWorkspace = "build.repository.tfvc.workspace";
@@ -562,6 +563,7 @@ public static class Task
                 Build.GatedRunCI,
                 Build.GatedShelvesetName,
                 Build.Number,
+                Build.PipelineRepoName,
                 Build.RepoClean,
                 Build.RepoGitSubmoduleCheckout,
                 Build.RepoId,