diff --git a/o/OpenMPI/OpenMPI-4.1.6-GCC-13.2.0.eb b/o/OpenMPI/OpenMPI-4.1.6-GCC-13.2.0.eb
index 828c6ee0..6caf4853 100644
--- a/o/OpenMPI/OpenMPI-4.1.6-GCC-13.2.0.eb
+++ b/o/OpenMPI/OpenMPI-4.1.6-GCC-13.2.0.eb
@@ -1,5 +1,5 @@
 # IT4Innovations
-# LK 2023
+# LK 2024
 
 name = 'OpenMPI'
 version = '4.1.6'
@@ -55,6 +55,13 @@ preconfigopts = ' && '.join([
 
 # CUDA related patches and custom configure option can be removed if CUDA support isn't wanted.
 configopts = '--with-cuda=internal '
+
+# disable MPI1 compatibility for now, see what breaks...
+# configopts += '--enable-mpi1-compatibility '
+
+# to enable SLURM integration (site-specific)
+# configopts += '--with-slurm --with-pmi=/usr/include/slurm --with-pmi-libdir=/usr'
+
 configopts += '--enable-shared --enable-mpi-thread-multiple --with-verbs '
 configopts += '--enable-mpirun-prefix-by-default '
 configopts += '--with-hwloc=$EBROOTHWLOC '  # hwloc support