CI: fix IntelLLVM builds

Author: EZoni

.github/workflows/dependencies/dpcpp.sh

@@ -28,14 +28,17 @@ df -h
 # Install and reduce disk space
 # https://github.com/ECP-WarpX/WarpX/pull/1566#issuecomment-790934878
 
+apt-cache policy intel-oneapi-mkl-devel
+
 # try apt install up to five times, to avoid connection splits
 status=1
 for itry in {1..5}
 do
     sudo apt-get install -y --no-install-recommends \
         build-essential \
         cmake           \
-        intel-oneapi-compiler-dpcpp-cpp intel-oneapi-mkl-devel \
+        intel-oneapi-compiler-dpcpp-cpp=2024.2.1-1079 \
+        intel-oneapi-mkl-devel \
         g++ gfortran    \
         libopenmpi-dev  \
         openmpi-bin     \

.github/workflows/intel.yml

@@ -112,6 +112,7 @@ jobs:
         set +e
         source /opt/intel/oneapi/setvars.sh
         set -e
+        export PATH=$PATH:/opt/intel/oneapi/compiler/2024.2/bin  # FIXME
         export CXX=$(which icpx)
         export CC=$(which icx)
 
@@ -176,6 +177,7 @@ jobs:
         set +e
         source /opt/intel/oneapi/setvars.sh
         set -e
+        export PATH=$PATH:/opt/intel/oneapi/compiler/2024.2/bin  # FIXME
         export CXX=$(which icpx)
         export CC=$(which icx)
         export CXXFLAGS="-fsycl ${CXXFLAGS}"