diff --git a/.github/workflows/merge_build.yml b/.github/workflows/merge_build.yml
index 5f4fc008f..681bf6b1d 100644
--- a/.github/workflows/merge_build.yml
+++ b/.github/workflows/merge_build.yml
@@ -36,16 +36,37 @@ jobs:
       malloc-impl: ${{ matrix.malloc-impl }}
       prerelease: ${{ matrix.prerelease }}
       tooling: ${{ matrix.tooling }}
-      #  ChainBuild:
-      #    runs-on: "ubuntu-22.04"
-      #    steps:
-      #    - name: Start HomeObject Build
-      #      run: |
-      #        curl -L \
-      #          -X POST \
-      #          -H "Accept: application/vnd.github+json" \
-      #          -H "Authorization: Bearer ${{ secrets.CHAIN_BUILD_TOKEN }}"\
-      #          -H "X-GitHub-Api-Version: 2022-11-28" \
-      #          https://api.github.com/repos/eBay/homeobject/actions/workflows/conan_build.yml/dispatches \
-      #          -d '{"ref":"main","inputs":{}}'
-      #      if: ${{ github.ref == 'refs/heads/master' }}
+  ChainBuild:
+    needs: Build
+    runs-on: "ubuntu-24.04"
+    steps:
+      - name: Get HomeObject default branch
+        id: get-branch
+        run: |
+          set -euo pipefail
+
+          DEFAULT_BRANCH=$(curl --fail --show-error --silent --location \
+            -H "Accept: application/vnd.github+json" \
+            -H "Authorization: Bearer ${{ secrets.CHAIN_BUILD_TOKEN }}" \
+            -H "X-GitHub-Api-Version: 2022-11-28" \
+            https://api.github.com/repos/eBay/homeobject \
+            | jq -r '.default_branch')
+
+          if [ -z "$DEFAULT_BRANCH" ] || [ "$DEFAULT_BRANCH" = "null" ]; then
+            echo "Failed to determine HomeObject default branch from GitHub API response" >&2
+            exit 1
+          fi
+
+          echo "default_branch=$DEFAULT_BRANCH" >> "$GITHUB_OUTPUT"
+          echo "HomeObject default branch: $DEFAULT_BRANCH"
+
+      - name: Start HomeObject Build
+        run: |
+          curl -L \
+            -X POST \
+            -H "Accept: application/vnd.github+json" \
+            -H "Authorization: Bearer ${{ secrets.CHAIN_BUILD_TOKEN }}" \
+            -H "X-GitHub-Api-Version: 2022-11-28" \
+            https://api.github.com/repos/eBay/homeobject/actions/workflows/conan_build.yml/dispatches \
+            -d '{"ref":"${{ steps.get-branch.outputs.default_branch }}","inputs":{}}'
+        if: ${{ github.ref == 'refs/heads/stable/v7.x' }}