diff --git a/.github/workflows/main.yaml b/.github/workflows/main.yaml
index 43ab779..a103655 100644
--- a/.github/workflows/main.yaml
+++ b/.github/workflows/main.yaml
@@ -9,7 +9,7 @@ on:
     branches:
       - master
 jobs:
-  build-mex:
+  build:
     runs-on: ${{ matrix.os }}
     strategy:
       fail-fast: false
@@ -17,15 +17,61 @@ jobs:
         os: [ubuntu-latest,windows-latest,macos-latest,macos-14]
     steps:
     - name: Retrieve the source code
-      uses: actions/checkout@v3
+      uses: actions/checkout@v4
       with:
         fetch-depth: 0
     - name: Remove old MEX files
       shell: bash
-      run: rm Solver/Mexfun/*.mex* Solver/Mexfun/*/*.mex*
+      run: rm Solver/Mexfun/*.mex*
     - name: Install MATLAB
       uses: matlab-actions/setup-matlab@v2
+      with:
+        release: ${{ matrix.os == 'macos-14' && 'R2023b' || ( matrix.os == 'windows-latest' && 'R2021b' || 'R2021a' ) }}
     - name: Build MEX files
       uses: matlab-actions/run-command@v2
       with:
         command: install_sdpt3 -rebuild
+    - uses: actions/upload-artifact@v4
+      with:
+        name: mexfiles-${{ matrix.os }}
+        path: |
+          Solver/Mexfun/*.mex*
+  package:
+    needs: build
+    runs-on: ubuntu-latest
+    steps:
+    - name: Retrieve the source code
+      uses: actions/checkout@v3
+      with:
+        fetch-depth: 0
+    - uses: actions/download-artifact@v4
+      with:
+        name: mexfiles-ubuntu-latest
+    - uses: actions/download-artifact@v4
+      with:
+        name: mexfiles-windows-latest
+    - uses: actions/download-artifact@v4
+      with:
+        name: mexfiles-macos-latest
+    - uses: actions/download-artifact@v4
+      with:
+        name: mexfiles-macos-14
+    - name: Show files, build archives
+      run: |
+        mv *.mex* Solver/Mexfun/
+        mkdir ../archives
+        zip -r ../archives/sdpt3.zip . -x '.git/*' -x '.github/*'
+        tar cfz ../archives/sdpt3.tgz --exclude "./.git" --exclude "./.github" .
+        echo "--------"
+        tar tfz ../archives/sdpt3.tgz
+        echo "--------"
+        zipinfo ../archives/sdpt3.zip
+        echo "--------"
+    - uses: actions/upload-artifact@v4
+      with:
+        uses: softprops/action-gh-release@v2
+        if: startsWith(github.ref, 'refs/tags/')
+        with:
+          files: |
+            ../archives/sdpt3.tgz
+            ../archives/sdpt3.zip