diff --git a/README.md b/README.md
index 8b964c36afdd38cdb18813a9bbd9644beb8c8249..bd71d79770ffe782fdd0941c2d3842f92173efb3 100644
--- a/README.md
+++ b/README.md
@@ -4,54 +4,27 @@
 # BUILDING OPAL-X on Merlin
 
 
-## Modules needed
-
-load_ipplomp() { 
-module purge
-module use unstable
-module load cmake/3.25.2
-module load gcc/11.4.0      # does not work for openmp and mixed module load gcc/12.3.0
-module load openmpi
-module load boost
-module load fftw
-module load gtest
-module load gsl
-module load hdf5
-module load H5hut
-module load boost
-module load cuda/12.1.1
-export BOOST_ROOT=$BOOST_DIR
-export OMP_PROC_BIND=spread
-}
-
-## build for Kokkos, FEFFTe and IPPL
-
-% git clone git@github.com:IPPL-framework/ippl-build-scripts.git
-
-set the correct environment, adjust the path in ITB_DOWNLOAD_DIR
-
-% export ITB_DOWNLOAD_DIR=/data/project/general/isodarUQ/adelmann
-% export ITB_SRC_DIR=${ITB_DOWNLOAD_DIR}/downloads
-% export ITB_PREFIX=${ITB_DOWNLOAD_DIR}/install
-% mkdir -p ${ITB_SRC_DIR}
-% mkdir -p ${ITB_PREFIX}
-
-Now you can build serial and with openmp
-
-% ./999-build-everything -t serial  --kokkos --heffte --ippl --export -u
-% ./999-build-everything -t openmp --enable-openmp --kokkos --heffte --ippl --export -u
-
-
-here is still a problem with cuda (./999-build-everything -t mixed --enable-cuda --enable-openmp --kokkos --heffte --ippl --export --arch=PASCAL6 -u)
-
-## Checkout OPAL-X
-
-% git clone git@gitlab.psi.ch:OPAL/opal-x/src.git 
-
-Change to build-script
-
-401-build-opal -r openmp --export -u 
-
+## Modules needed OPENMP build
+
+cmake/3.25.2
+openmpi/4.1.5_slurm
+fftw/3.3.10_merlin6    
+gsl/2.7                
+H5hut/2.0.0rc6_slurm  11) emacs/29.1
+gcc/12.3.0             
+boost/1.82.0_slurm     
+gtest/1.13.0-1         
+hdf5/1.10.8_slurm     
+gnutls/3.5.19
+
+
+## Clone repo and build opal-x with OPENMP 
+
+% git clone git@gitlab.psi.ch:OPAL/opal-x/src.git opal-x
+% cd opal-x
+% ./gen_OPALrevision
+% mkdir build_openmp && cd build_openmp
+% cmake .. -DCMAKE_BUILD_TYPE=Debug -DCMAKE_CXX_STANDARD=20  -DENABLE_SOLVERS=ON  -DENABLE_FFT=ON -DIPPL_PLATFORMS=openmp