diff --git a/.github/workflows/build_custom_wheel.yml b/.github/workflows/build_custom_wheel.yml
new file mode 100644
index 000000000..093763752
--- /dev/null
+++ b/.github/workflows/build_custom_wheel.yml
@@ -0,0 +1,34 @@
+name: Build INT64 Wheel
+
+on:
+  workflow_dispatch:
+  push:
+
+jobs:
+  build-wheel:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v4
+
+      - name: Set up Build Environment
+        uses: mamba-org/setup-micromamba@v1
+        with:
+          environment-file: conda/environments/all_cuda-131_arch-x86_64.yaml
+          environment-name: cuopt_build
+          cache-environment: true
+
+      - name: Build Wheel
+        shell: bash -el {0}
+        run: |
+          ./build.sh libmps_parser libcuopt cuopt --skip-tests-build --cmake-args=\"-DCUOPT_INSTANTIATE_INT64=ON -DCUOPT_INSTANTIATE_INT32=OFF\"
+          cd python/cuopt
+          python -m pip wheel . -w dist_thin --no-deps --no-build-isolation
+          python -m pip install auditwheel
+          mkdir -p dist
+          auditwheel repair dist_thin/*.whl --plat manylinux_2_39_x86_64 -w dist/
+
+      - name: Upload Wheel as Artifact
+        uses: actions/upload-artifact@v4
+        with:
+          name: cuopt-int64-wheel
+          path: python/cuopt/dist/*.whl
diff --git a/build.sh b/build.sh
index b5c35f510..1e511807d 100755
--- a/build.sh
+++ b/build.sh
@@ -348,6 +348,7 @@ if buildAll || hasArg libmps_parser; then
     cmake -DDEFINE_ASSERT=${DEFINE_ASSERT} \
           -DCMAKE_INSTALL_PREFIX="${INSTALL_PREFIX}" \
           "${CACHE_ARGS[@]}" \
+          "${EXTRA_CMAKE_ARGS[@]}" \
           "${REPODIR}"/cpp/libmps_parser/
 
     if hasArg -n; then