diff --git a/.github/workflows/build-numpy.yml b/.github/workflows/build-numpy.yml
index 19cf006f..d57490d7 100644
--- a/.github/workflows/build-numpy.yml
+++ b/.github/workflows/build-numpy.yml
@@ -11,7 +11,7 @@ on:
 jobs:
   NumPyMultiarrayTests:
 
-    runs-on: ubuntu-latest
+    runs-on: self-hosted
 
     steps:
     - name: Checkout x86-simd-sort
@@ -24,10 +24,10 @@ jobs:
       working-directory: ${{ github.workspace }}/x86-simd-sort
       run: git switch -c pr-branch
 
-    - name: Install build dependencies
-      run: |
-        sudo apt update
-        sudo apt -y install g++-12 gcc-12 git
+        #- name: Install build dependencies
+        #run: |
+        #sudo apt update
+        #sudo apt -y install g++-12 gcc-12 git
 
     - name: Checkout NumPy main
       uses: actions/checkout@v3
@@ -38,9 +38,9 @@ jobs:
         ref: main
         path: numpy
 
-    - uses: actions/setup-python@v4
-      with:
-        python-version: '3.10'
+          #- uses: actions/setup-python@v4
+          #with:
+          #python-version: '3.10'
 
     - name: Install NumPy dependencies
       working-directory: ${{ github.workspace }}/numpy
@@ -59,8 +59,8 @@ jobs:
     - name: Build & run NumPy sort tests
       working-directory: ${{ github.workspace }}/numpy
       env:
-        CXX: g++-12
-        CC: gcc-12
+        CXX: g++
+        CC: gcc
       run: |
         python runtests.py -t numpy/core/tests/test_multiarray.py
 
diff --git a/.github/workflows/c-cpp.yml b/.github/workflows/c-cpp.yml
index 67708ef1..58bf0ef8 100644
--- a/.github/workflows/c-cpp.yml
+++ b/.github/workflows/c-cpp.yml
@@ -9,33 +9,35 @@ on:
 jobs:
   ICX:
 
-    runs-on: ubuntu-latest
+    runs-on: self-hosted
 
     steps:
     - uses: actions/checkout@v3
 
-    - name: Install dependencies
-      run: |
-        sudo apt update
-        sudo apt -y install g++-10 libgtest-dev meson curl git cmake
-
-    - name: Install google benchmarks
-      run: |
-        git clone https://github.com/google/benchmark.git
-        cd benchmark
-        cmake -E make_directory "build"
-        cmake -E chdir "build" cmake -DBENCHMARK_ENABLE_GTEST_TESTS=OFF -DBENCHMARK_ENABLE_TESTING=OFF -DCMAKE_BUILD_TYPE=Release ../
-        sudo cmake --build "build" --config Release --target install
-
-    - name: Install Intel SDE
-      run: |
-        curl -o /tmp/sde.tar.xz https://downloadmirror.intel.com/732268/sde-external-9.7.0-2022-05-09-lin.tar.xz
-        mkdir /tmp/sde && tar -xvf /tmp/sde.tar.xz -C /tmp/sde/
-        sudo mv /tmp/sde/* /opt/sde && sudo ln -s /opt/sde/sde64 /usr/bin/sde
+      #- name: Install dependencies
+      #run: |
+      #  sudo apt update
+      #  sudo apt -y install g++-10 libgtest-dev meson curl git cmake
+
+      #- name: Install google benchmarks
+      #  run: |
+      #    git clone https://github.com/google/benchmark.git
+      #    cd benchmark
+      #    cmake -E make_directory "build"
+      #    cmake -E chdir "build" cmake -DBENCHMARK_ENABLE_GTEST_TESTS=OFF -DBENCHMARK_ENABLE_TESTING=OFF -DCMAKE_BUILD_TYPE=Release ../
+      #    sudo cmake --build "build" --config Release --target install
+
+      #- name: Install Intel SDE
+      #  run: |
+      #    curl -o /tmp/sde.tar.xz https://downloadmirror.intel.com/732268/sde-external-9.7.0-2022-05-09-lin.tar.xz
+      #    mkdir /tmp/sde && tar -xvf /tmp/sde.tar.xz -C /tmp/sde/
+      #    sudo mv /tmp/sde/* /opt/sde && sudo ln -s /opt/sde/sde64 /usr/bin/sde
 
     - name: Build
       env:
-        CXX: g++-10
+        CXX: g++-9
+        CFLAGS: ""
+        CXXFLAGS: ""
       run: |
         make clean
         meson setup --warnlevel 2 --werror --buildtype plain builddir
@@ -47,33 +49,35 @@ jobs:
 
   SPR:
 
-    runs-on: ubuntu-latest
+    runs-on: self-hosted
 
     steps:
     - uses: actions/checkout@v3
 
-    - name: Install dependencies
-      run: |
-        sudo apt update
-        sudo apt -y install g++-12 libgtest-dev meson curl git cmake
-
-    - name: Install google benchmarks
-      run: |
-        git clone https://github.com/google/benchmark.git
-        cd benchmark
-        cmake -E make_directory "build"
-        cmake -E chdir "build" cmake -DBENCHMARK_ENABLE_GTEST_TESTS=OFF -DBENCHMARK_ENABLE_TESTING=OFF -DCMAKE_BUILD_TYPE=Release ../
-        sudo cmake --build "build" --config Release --target install
-
-    - name: Install Intel SDE
-      run: |
-        curl -o /tmp/sde.tar.xz https://downloadmirror.intel.com/732268/sde-external-9.7.0-2022-05-09-lin.tar.xz
-        mkdir /tmp/sde && tar -xvf /tmp/sde.tar.xz -C /tmp/sde/
-        sudo mv /tmp/sde/* /opt/sde && sudo ln -s /opt/sde/sde64 /usr/bin/sde
+      #- name: Install dependencies
+      #run: |
+      #  sudo apt update
+      #  sudo apt -y install g++-12 libgtest-dev meson curl git cmake
+
+      #- name: Install google benchmarks
+      #  run: |
+      #    git clone https://github.com/google/benchmark.git
+      #    cd benchmark
+      #    cmake -E make_directory "build"
+      #    cmake -E chdir "build" cmake -DBENCHMARK_ENABLE_GTEST_TESTS=OFF -DBENCHMARK_ENABLE_TESTING=OFF -DCMAKE_BUILD_TYPE=Release ../
+      #    sudo cmake --build "build" --config Release --target install
+
+      #- name: Install Intel SDE
+      #  run: |
+      #    curl -o /tmp/sde.tar.xz https://downloadmirror.intel.com/732268/sde-external-9.7.0-2022-05-09-lin.tar.xz
+      #    mkdir /tmp/sde && tar -xvf /tmp/sde.tar.xz -C /tmp/sde/
+      #    sudo mv /tmp/sde/* /opt/sde && sudo ln -s /opt/sde/sde64 /usr/bin/sde
 
     - name: Build
       env:
-        CXX: g++-12
+        CXX: g++
+        CFLAGS: ""
+        CXXFLAGS: ""
       run: |
         make clean
         meson setup --warnlevel 2 --werror --buildtype plain builddir