diff --git a/.github/workflows/centos7-system-deps-build.yml b/.github/workflows/centos7-system-deps-build.yml
index 07b9fac34..cd261bf66 100644
--- a/.github/workflows/centos7-system-deps-build.yml
+++ b/.github/workflows/centos7-system-deps-build.yml
@@ -102,6 +102,7 @@ jobs:
 
       - name: Configure
         run: |
+          source /opt/rh/devtoolset-9/enable
           export LD_LIBRARY_PATH=/usr/lib64/openmpi/lib:$LD_LIBRARY_PATH
           export PATH=/usr/lib64/openmpi/bin:$PATH
           cmake -B _build -S . \
@@ -110,6 +111,7 @@ jobs:
 
       - name: Build
         run: |
+          source /opt/rh/devtoolset-9/enable
           export LD_LIBRARY_PATH=/usr/lib64/openmpi/lib:$LD_LIBRARY_PATH
           export PATH=/usr/lib64/openmpi/bin:$PATH
           cmake --build _build --config Release -j2 --target install