diff --git a/.github/workflows/main.yml b/.github/workflows/main.yml
index 8e1ef83a..fdd5647b 100644
--- a/.github/workflows/main.yml
+++ b/.github/workflows/main.yml
@@ -84,6 +84,7 @@ jobs:
           -DHDF5_ENABLE_Z_LIB_SUPPORT=OFF \
           -DCMAKE_BUILD_TYPE=RelWithDebInfo -DHDF5_ENABLE_THREADSAFE=OFF \
           -DCMAKE_INSTALL_PREFIX=${{github.workspace}}/hdf5install \
+          -DCMAKE_C_COMPILER=${{matrix.compiler}} \
           ..
           make 
           make install
@@ -120,7 +121,10 @@ jobs:
         run: |
           ./autogen.sh
           mkdir ${{github.workspace}}/vol-rest/install
-          CFLAGS="-D_POSIX_C_SOURCE=200809L" ./configure --prefix=${{github.workspace}}/vol-rest/install --with-hdf5=${{github.workspace}}/hdf5install
+          CFLAGS="-D_POSIX_C_SOURCE=200809L" ./configure \
+          --prefix=${{github.workspace}}/vol-rest/install \
+          --with-hdf5=${{github.workspace}}/hdf5install \
+          CC=${{matrix.compiler}}
         shell: bash
         working-directory: ${{github.workspace}}/vol-rest