diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index ae08c20..237d716 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -1,132 +1,188 @@
-name: Basic SeDuMi tests
-
-# Controls when the action will run.
+name: CI
 on:
-  # Triggers the workflow on push or pull request events but only for the main branch
   push:
-    branches: [ master ]
+    branches:
+      - master
+    tags:
+      - '*'
   pull_request:
-    branches: [ master ]
-
-  workflow_dispatch:
-
+    branches:
+      - master
 jobs:
-
-  matlab:
-    name: Matlab (latest) on Ubuntu (latest)
-    runs-on: ubuntu-latest
-
-    steps:
-      - name: Check out repository
-        uses: actions/checkout@v3
-
-      - name: Install MATLAB
-        uses: matlab-actions/setup-matlab@v1
-
-      - name: Run basic SeDuMi tests
-        uses: matlab-actions/run-command@v1
-        with:
-          command: cd examples; test_sedumi(1, 1);
-
-
-  macos-octave:
-    name: Octave (latest) on macOS (latest)
-    runs-on: macos-latest
-
+  build-mex:
+    runs-on: ${{ matrix.os }}
+    strategy:
+      matrix:
+        os: [ubuntu-20.04,windows-2019,macos-12,macos-14]
     steps:
-      - name: Check out repository
-        uses: actions/checkout@v3
-
-      - name: Install Octave by homebrew
-        run: brew install octave
-
-      - name: Run basic SeDuMi tests
-        run: octave --eval "cd examples; test_sedumi(1, 1);"
-
-
-  windows-octave:
-    name: Octave (latest) on MS Windows (latest)
-    runs-on: windows-latest
-
+    - name: Retrieve the source code
+      uses: actions/checkout@v4
+      with:
+        fetch-depth: 0
+    - name: Install MATLAB
+      uses: matlab-actions/setup-matlab@v2
+      with:
+        release: ${{ matrix.os == 'macos-14' && 'R2023b' || ( matrix.os == 'windows-2019' && 'R2021b' || 'R2021a' ) }}
+    - name: Build and test
+      uses: matlab-actions/run-command@v2
+      with:
+        command: "install_sedumi -rebuild; cd examples; test_sedumi(1, 1)"
+    - name: Upload MATLAB MEX files
+      uses: actions/upload-artifact@v4
+      with:
+        name: mex-${{ matrix.os }}
+        path: "*.mex*"
+  build-oct:
+    runs-on: ${{ matrix.os }}
+    strategy:
+      matrix:
+        os: [ubuntu-20.04,windows-2019,macos-12,macos-14]
     steps:
-      - name: Check out repository
-        uses: actions/checkout@v3
-
-      - name: Install Octave by Chocolatey
-        run: choco install octave.portable
-
-      - name: Run basic SeDuMi tests
-        run: octave-cli.exe --eval "cd examples; test_sedumi(1, 1);"
-
-
-  ubuntu-20_04-octave:
-    name: Octave 5.2.0 on Ubuntu 20.04
-    runs-on: ubuntu-20.04
-
+    - name: Retrieve the source code
+      uses: actions/checkout@v4
+      with:
+        fetch-depth: 0
+    - name: Install Octave
+      shell: bash
+      run: |
+        if [ "${{ matrix.os }}" = ubuntu-20.04 ]; then
+          sudo apt update
+          sudo apt install --no-install-recommends octave liboctave-dev libopenblas-dev
+        elif [ "${{ matrix.os }}" = windows-2019 ]; then
+          choco install octave.portable
+        else
+          brew install octave
+        fi
+    - name: Build and test (Unix)
+      if: matrix.os != 'windows-2019'
+      run: octave --eval "install_sedumi -rebuild; test_sedumi(1, 1)"
+    - name: Build and test (Windows)
+      if: matrix.os == 'windows-2019'
+      shell: cmd
+      run: |
+        set PATH=C:\ProgramData\chocolatey\bin;%PATH%
+        octave-cli.exe --no-gui --eval "install_sedumi -rebuild; test_sedumi(1, 1)"
+        if %errorlevel% neq 0 exit /b %errorlevel%
+    - name: Upload Octave MEX files
+      uses: actions/upload-artifact@v4
+      with:
+        name: oct-${{ matrix.os }}
+        path: "*.mex"
+  package:
+    needs: [build-mex,build-oct]
+    runs-on: ubuntu-latest
     steps:
-      - name: Check out repository
-        uses: actions/checkout@v3
-
-      - name: Install Octave
-        run: |
-          sudo apt-get -y update
-          sudo apt-get -y install octave liboctave-dev libopenblas-dev
-
-      - name: Run basic SeDuMi tests
-        run: octave --eval "cd examples; test_sedumi(1, 1);"
-
-
-  ubuntu-18_04-octave:
-    name: Octave 4.2.2 on Ubuntu 18.04
-    runs-on: ubuntu-18.04
-
+    - name: Retrieve the source code
+      uses: actions/checkout@v4
+      with:
+        fetch-depth: 0
+    - name: Retrieve artifacts
+      uses: actions/download-artifact@v4
+    - name: Move artifacts into place
+      run: |
+        mkdir -p o_lin  && mv oct-ubuntu-*/* o_lin/
+        mkdir -p o_win  && mv oct-windows-*/* o_win/
+        mkdir -p o_maci && mv oct-macos-12/* o_maci/
+        mkdir -p o_maca && mv oct-macos-14/* o_maca/
+        mv mex-*/* .
+        rmdir mex-* oct-*
+    - name: Show files, build archives
+      run: |
+        cd ..
+        zip -r sedumi.zip sedumi -x 'sedumi/.git/*' -x 'sedumi/.github/*'
+        tar cfz sedumi.tgz --exclude "sedumi/.git" --exclude "sedumi/.github" sedumi
+        echo "--------"
+        tar tfz sedumi.tgz
+        echo "--------"
+        zipinfo sedumi.zip
+        echo "--------"
+        mv sedumi.tgz sedumi.zip sedumi
+    - name: Upload bundles
+      uses: actions/upload-artifact@v4
+      with:
+        name: bundles
+        path: |
+          sedumi.zip
+          sedumi.tgz
+  matlab-tests:
+    needs: package
+    runs-on: ${{ matrix.os }}
+    strategy:
+      fail-fast: false
+      matrix:
+        os: [ubuntu-latest,macos-latest,windows-latest,macos-14]
     steps:
-      - name: Check out repository
-        uses: actions/checkout@v3
-
-      - name: Install Octave
-        run: |
-          sudo apt-get -y update
-          sudo apt-get -y install octave liboctave-dev libopenblas-dev
-
-      - name: Run basic SeDuMi tests
-        run: octave --eval "cd examples; test_sedumi(1, 1);"
-
-
-  flatpak-octave:
-    name: Octave (latest) on Flatpak (latest)
-    runs-on: ubuntu-latest
-
+    - name: Retrieve artifact
+      uses: actions/download-artifact@v4
+      with:
+        name: bundles
+    - name: Unpack artifact
+      run: tar xfz sdpt3.tgz --strip-components=1
+    - name: Install latest MATLAB
+      uses: matlab-actions/setup-matlab@v2
+    - name: Run test
+      uses: matlab-actions/run-command@v2
+      with:
+        command: "install_sedumi; cd examples; test_sedumi(1, 1)"
+  octave-tests:
+    needs: package
+    runs-on: ${{ matrix.os }}
+    strategy:
+      fail-fast: false
+      matrix:
+        os: [ubuntu-latest,windows-latest,macos-latest,macos-14]
     steps:
-      - name: Check out repository
-        uses: actions/checkout@v3
-
-      - name: Install Octave
-        run: |
-          sudo apt-get -y update
-          sudo apt-get -y install flatpak
-          flatpak remote-add --user --if-not-exists \
-                  flathub https://flathub.org/repo/flathub.flatpakrepo
-          flatpak install --user -y flathub org.octave.Octave
-
-      - name: Run basic SeDuMi tests
-        run: |
-          flatpak run org.octave.Octave --eval "cd examples; test_sedumi(1, 1);"
-
-
-  snap-octave:
-    name: Octave (latest) on Snap (latest)
+    - name: Retrieve artifact
+      uses: actions/download-artifact@v4
+      with:
+        name: bundles
+    - name: Unpack artifact
+      run: tar xfz sedumi.tgz --strip-components=1
+    - name: Install Octave, Snap, Flatpak
+      shell: bash
+      run: |
+        if [ "${{ matrix.os }}" = ubuntu-latest ]; then
+          sudo apt update
+          sudo apt install --no-install-recommends octave snapd flatpak
+        elif [ "${{ matrix.os }}" = windows-latest ]; then
+          choco install octave.portable
+        else
+          brew install octave
+        fi
+    - name: Run test
+      if: matrix.os != 'windows-latest'
+      run: octave --eval "install_sedumi; cd examples; test_sedumi(1, 1)"
+    - name: Run test
+      if: matrix.os == 'windows-latest'
+      shell: cmd
+      run: |
+        set PATH=C:\ProgramData\chocolatey\bin;%PATH%
+        octave-cli.exe --no-gui --eval "install_sedumi; cd examples; test_sedumi(1, 1)"
+    - name: Flatpak
+      if: matrix.os == 'ubuntu-latest'
+      run: |
+        flatpak remote-add --user --if-not-exists \
+                flathub https://flathub.org/repo/flathub.flatpakrepo
+        flatpak install --user -y flathub org.octave.Octave
+        flatpak run org.octave.Octave --eval "install_sedumi; cd examples; test_sedumi(1, 1)"
+        flatpak uninstall --user -y org.octave.Octave
+    - name: Snapd
+      if: matrix.os == 'ubuntu-latest'
+      run: |
+        sudo snap install octave
+        snap run octave --eval "install_sedumi; cd examples; test_sedumi(1, 1)"
+        sudo snap remove octave
+  publish:
+    needs: [matlab-tests,octave-tests]
+    if: startsWith(github.ref, 'refs/tags/')
     runs-on: ubuntu-latest
-
     steps:
-      - name: Check out repository
-        uses: actions/checkout@v3
-
-      - name: Install Octave
-        run: |
-          sudo apt-get -y update
-          sudo apt-get -y install snapd
-          sudo snap install octave
-
-      - name: Run basic SeDuMi tests
-        run: snap run octave --eval "cd examples; test_sedumi(1, 1);"
+    - name: Retrieve artifacts
+      uses: actions/download-artifact@v4
+      with:
+        name: bundles
+    - uses: softprops/action-gh-release@v2
+      with:
+        files: |
+          sedumi.tgz
+          sedumi.zip
\ No newline at end of file
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diff --git a/install_sedumi.m b/install_sedumi.m
index 5ce5b60..91dcbe6 100644
--- a/install_sedumi.m
+++ b/install_sedumi.m
@@ -111,17 +111,34 @@ function install_sedumi( varargin )
 
 % Get first file of "targets64" and replace ".c" with mex-extension.
 % Keep order of "targets64".
+mext = mexext;
 mex_binaries = cellfun (@strtok, targets64, 'UniformOutput', false);
-mex_binaries = cellfun (@(x) strrep (x, '.c', ['.', mexext()]), ...
+mex_binaries = cellfun (@(x) strrep (x, '.c', ['.', mext]), ...
   mex_binaries, 'UniformOutput', false);
 
+fs = filesep();
 sedumi_path = mfilename ('fullpath');
-sedumi_path = sedumi_path(1:max ([1, strfind(sedumi_path, filesep ())]) - 1);
+sedumi_path = sedumi_path(1:max ([1, strfind(sedumi_path, fs)]) - 1);
 
+% Note the use of 0.01 here. That's because version 7 had more than 10
+% minor releases, so 7.10-7.14 need to be ordered after 7.01-7.09.
+VERSION  = [1, 0.01] * sscanf (version (), '%d.%d');
+COMPUTER = computer ();
 ISOCTAVE = (exist ('OCTAVE_VERSION', 'builtin') == 5);
+mdir = '';
 if (ISOCTAVE)
   prog = 'Octave';
   page_output_immediately (true, 'local');
+  switch COMPUTER
+  case 'x86_64-pc-linux-gnu'
+      mdir = 'o_lin';
+  case 'x86_64-apple-darwin21.6.0'
+      mdir = 'o_maci';
+  case 'aarch64-apple-darwin23.4.0'
+      mdir = 'o_maca';
+  case 'i686-w64-mingw32'
+      mdir = 'o_win';
+  end
 else
   prog = 'Matlab';
 end
@@ -141,11 +158,19 @@ function install_sedumi( varargin )
 % guarantee that rebuilding will work.
 if (~need_rebuild)
   fprintf ('Looking for existing binaries...');
-  nfound = count_mex_binaries ();
-  if (nfound == 0)
+  nfound = [0, 0];
+  for k = 1 : length(targets64)
+      targ = mex_binaries{k};
+      if exist( [ sedumi_path, fs, targ ], 'file' )
+          nfound(1) = nfound(1) + 1;
+      elseif ~isempty(mdir) && exist( [ sedumi_path, fs, mdir, fs, targ ], 'file' )
+          nfound(2) = nfound(2) + 1;
+      end
+  end
+  if sum(nfound) == 0
     fprintf ('none found; building...\n');
     need_rebuild = true;
-  elseif (nfound < length(targets64))
+  elseif sum(nfound) < length(targets64)
     fprintf ('incomplete set found.\n');
     disp (line_sep);
     error (['%s\n', ...
@@ -163,6 +188,7 @@ function install_sedumi( varargin )
 end
 
 if (need_rebuild)
+  mdir = '';
   disp ('Attempting to recompile the SeDuMi binaries:');
 
   % Customization by providing a mex template.
@@ -179,8 +205,10 @@ function install_sedumi( varargin )
       if (ismac ())
         % Assume Homebrew (https://brew.sh/) installation.
         % https://stackoverflow.com/questions/50634727/dyld-library-not-loaded-usr-local-opt-openblas-lib-libopenblasp-r0-2-20-dylib
-        flags{end+1} = '-I/usr/local/opt/openblas/include';
-        libs{end+1}  = '-L/usr/local/opt/openblas/lib -lopenblas';
+        % this glob covers /opt/homebrew and /usr/local installations
+        homebrew = glob('/*/*/Cellar/openblas/*/include');
+        flags{end+1} = ['-I', homebrew{1}];
+        libs{end+1}  = ['-L', strrep(homebrew{1}, '/include', '/lib'), ' -lopenblas'];
       elseif (ispc ())
         libs{end+1}  = '-lopenblas';
       else
@@ -189,10 +217,6 @@ function install_sedumi( varargin )
         flags{end+1} = '-I/usr/include/openblas';
       end
     else % Matlab
-      % Note the use of 0.01 here. That's because version 7 had more than 10
-      % minor releases, so 7.10-7.14 need to be ordered after 7.01-7.09.
-      VERSION  = [1, 0.01] * sscanf (version (), '%d.%d');
-      COMPUTER = computer ();
       % The last Matlab release with a 32 bit version was R2015b.
       IS64BIT  = strcmp (COMPUTER(end-1:end), '64');
       flags{end+1} = '-O';  % optimize
@@ -273,6 +297,15 @@ function install_sedumi( varargin )
   else
     fprintf ('already there.\n');
   end
+  if (ISOCTAVE && ~isempty(mdir))
+    fprintf ('   Octave MEX directory...       ');
+    if (~is_on_search_path (fullfile(sedumi_path, mdir)))
+      addpath (fullfile(sedumi_path, mdir));
+      fprintf ('added.\n');
+    else
+      fprintf ('already there.\n');
+    end
+  end
   fprintf ('   Conversion directory... ');
   if (~is_on_search_path (fullfile (sedumi_path, 'conversion')))
     addpath (fullfile (sedumi_path, 'conversion'));
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