diff --git a/.github/workflows/regression.yml b/.github/workflows/regression.yml
index 2c3fb94d..fd40c1c1 100644
--- a/.github/workflows/regression.yml
+++ b/.github/workflows/regression.yml
@@ -41,7 +41,7 @@ jobs:
          export PATH="/usr/lib/ccache:/usr/local/opt/ccache/libexec:$PATH"
          cd ${{ github.workspace }}/coriolis-2.x/src/yosys
          make ENABLE_PYOSYS=1 config-gcc
-         sudo make ENABLE_PYOSYS=1 install
+         sudo make ENABLE_PYOSYS=1 PREFIX=/usr install
 #        make ENABLE_PYOSYS=1 PREFIX=/install PYTHON_DESTDIR=/install/lib64/python3/dist-packages DESTDIR=${{ github.workspace }}/coriolis-2.x/Linux.x86_64/Release.Shared install
      - name: Build Alliance
        run: |