diff --git a/.github/actions/label/build.js b/.github/actions/label/build.js
index 39503e28172..c4d456b194e 100644
--- a/.github/actions/label/build.js
+++ b/.github/actions/label/build.js
@@ -3,8 +3,11 @@
  */
 
 const [owner, repo] = ["gear-tech", "gear"];
-const { LABEL, REF, HEAD_SHA } = process.env;
-const linux = LABEL === "A0-pleasereview";
+const { LABEL, REF, HEAD_SHA, TITLE, NUMBER } = process.env;
+const linux =
+  LABEL === "A0-pleasereview" ||
+  LABEL === "A4-insubstantial" ||
+  LABEL === "A2-mergeoncegreen";
 const checks = linux ? ["linux", "win-cross"] : ["x86"];
 const workflow_id = linux
   ? ".github/workflows/build.yml"
@@ -18,7 +21,7 @@ const sleep = (ms) => new Promise((r) => setTimeout(r, ms));
 /**
  *  If skipping this action.
  **/
-const skip = async ({ github }) => {
+const skip = async ({ core, github }) => {
   const {
     data: { check_runs },
   } = await github.rest.checks.listForRef({
@@ -27,16 +30,29 @@ const skip = async ({ github }) => {
     ref: REF,
   });
 
+  core.info(`check runs: ${check_runs}`);
+
   const runs = linux
-    ? check_runs.filter((run) => run.name === "build" || run.name === "build / linux")
-    : check_runs.filter((run) => run.name === "build / macox-x86");
+    ? check_runs.filter(
+      (run) => run.name === "build" || run.name === "build / linux"
+    )
+    : check_runs.filter((run) => run.name === "build / macos-x86");
 
-  if (runs.length === 0) return false;
+  // Skip this action by default.
+  let skipped = false;
   for (run of runs) {
-    if (run.conclusion !== "skipped") return true;
+    // Process this action only if the previous build has been skipped.
+    if (
+      (run.name === "build" && run.conclusion === "skipped")
+    )
+      skipped = true;
+
+    // If there is already a build, skip this action without more conditions.
+    if (run.name === "build / linux" || run.name === "build / macos-x86")
+      return true;
   }
 
-  return false;
+  return !skipped;
 };
 
 /**
@@ -72,8 +88,13 @@ const dispatchWorkflow = async ({ core, github }) => {
     repo,
     workflow_id,
     ref: REF,
+    inputs: {
+      title: TITLE,
+      number: NUMBER,
+    },
   });
 
+  // Wait for the workflow to be dispatched.
   await sleep(10000);
 
   // Get the target workflow run
@@ -86,12 +107,16 @@ const dispatchWorkflow = async ({ core, github }) => {
     head_sha: HEAD_SHA,
   });
 
-  if (workflow_runs.length != 1) {
+  if (workflow_runs.length === 0) {
     core.setFailed(`Incorrect workflow runs`);
     return;
   }
 
-  return workflow_runs[0];
+  let sorted_runs = workflow_runs.sort((a, b) => {
+    return new Date(b.created_at) - new Date(a.created_at);
+  });
+
+  return sorted_runs[0];
 };
 
 /// List jobs of workflow run.
@@ -122,14 +147,16 @@ const listJobs = async ({ github, core, run_id }) => {
  *  The main function.
  **/
 module.exports = async ({ github, core }) => {
-  if (await skip({ github })) {
+  if (await skip({ core, github })) {
     core.info("Build has already been processed.");
     return;
   }
 
   const run = await dispatchWorkflow({ core, github });
+  core.info(`Dispatched workflow ${run.html_url}`);
   let labelChecks = await createChecks({ core, github });
 
+  // Wait for the jobs to be completed.
   while (true) {
     const jobs = await listJobs({ github, core, run_id: run.id });
     completed = jobs.filter((job) => job.status === "completed").length;
@@ -171,7 +198,7 @@ module.exports = async ({ github, core }) => {
 
     if (completed === checks.length) {
       core.info("All jobs completed.");
-      break;
+      return;
     } else {
       await sleep(10000);
     }
diff --git a/.github/workflows/PR.yml b/.github/workflows/PR.yml
index 767f6dc3f33..6849ba7e024 100644
--- a/.github/workflows/PR.yml
+++ b/.github/workflows/PR.yml
@@ -53,6 +53,7 @@ jobs:
     needs: status
     if: >-
       contains(github.event.pull_request.labels.*.name, 'A0-pleasereview')
+      || contains(github.event.pull_request.labels.*.name, 'A4-insubstantial')
       || contains(github.event.pull_request.labels.*.name, 'A2-mergeoncegreen')
     uses: ./.github/workflows/build.yml
     with:
diff --git a/.github/workflows/build.yml b/.github/workflows/build.yml
index 674a0f60ca6..71e687d38d9 100644
--- a/.github/workflows/build.yml
+++ b/.github/workflows/build.yml
@@ -10,6 +10,15 @@ on:
         type: boolean
         default: false
   workflow_dispatch:
+    inputs:
+      title:
+        type: string
+        description: "Pull request title that triggers this workflow."
+      number:
+        type: string
+        description: "Pull request number that triggers this workflow"
+
+run-name: ${{ inputs.title }} ( ${{ format('#{0}', inputs.number) }} )
 
 env:
   CARGO_INCREMENTAL: 0
diff --git a/.github/workflows/label.yml b/.github/workflows/label.yml
index 187032b8adc..9dd2ef902dc 100644
--- a/.github/workflows/label.yml
+++ b/.github/workflows/label.yml
@@ -5,16 +5,14 @@ on:
     branches: [master, vara-stage-1, vara-stage-2, vara-stage-3]
     types: [labeled]
 
-concurrency:
-  group: ${{ github.workflow }}-${{ github.ref }}
-  cancel-in-progress: true
-
 jobs:
   dispatch:
     runs-on: ubuntu-latest
     if: >-
       github.event.label.name == 'A0-pleasereview'
       || github.event.label.name == 'E2-forcemacos'
+      || github.event.label.name == 'A4-insubstantial'
+      || github.event.label.name == 'A2-mergeoncegreen'
     steps:
       - uses: actions/checkout@v3
         with:
@@ -24,6 +22,8 @@ jobs:
           HEAD_SHA: ${{ github.event.pull_request.head.sha }}
           LABEL: ${{ github.event.label.name }}
           REF: ${{ github.head_ref || github.ref_name }}
+          TITLE: ${{ github.event.pull_request.title }}
+          NUMBER: ${{ github.event.number }}
         with:
           script: |
             const script = require('./.github/actions/label/build.js');