diff --git a/.github/workflows/build.yml b/.github/workflows/build.yml
index 28fd00238..5fcabffe4 100644
--- a/.github/workflows/build.yml
+++ b/.github/workflows/build.yml
@@ -21,8 +21,18 @@ jobs:
       - name: add llvm
         run: |
             if [ "$(expr substr $(uname -s) 1 5)" == "Linux" ]; then
+
               sudo apt-get update
-              sudo apt-get install -y git gcc g++ #python3 python3-dev python3-pip
+              sudo apt-get install -y git gcc g++ gcc-12 g++-12 #python3 python3-dev python3-pip
+              sudo update-alternatives --install /usr/bin/g++ g++ /usr/bin/g++-12 100
+              sudo update-alternatives --install /usr/bin/g++ g++ /usr/bin/g++-11 50
+              sudo update-alternatives --install /usr/bin/gcc gcc /usr/bin/gcc-12 100
+              sudo update-alternatives --install /usr/bin/gcc gcc /usr/bin/gcc-11 50
+              sudo update-alternatives --install /usr/bin/cpp cpp-bin /usr/bin/cpp-12 100
+              sudo update-alternatives --install /usr/bin/cpp cpp-bin /usr/bin/cpp-11 50
+              sudo update-alternatives --set g++ /usr/bin/g++-12
+              sudo update-alternatives --set gcc /usr/bin/gcc-12
+              sudo update-alternatives --set cpp-bin /usr/bin/cpp-12 
               #sudo python3 -m pip install --upgrade lit
               #- run: python3 -m pip install --user numpy
             fi