diff --git a/Grid/systems/tursa/files/gpu-mpi-wrapper.sh b/Grid/systems/tursa/files/gpu-mpi-wrapper.sh
index 9e6871d..9031efa 100755
--- a/Grid/systems/tursa/files/gpu-mpi-wrapper.sh
+++ b/Grid/systems/tursa/files/gpu-mpi-wrapper.sh
@@ -1,13 +1,12 @@
 #!/usr/bin/env bash
 
 lrank=$OMPI_COMM_WORLD_LOCAL_RANK
-numa1=$(( 2 * lrank))
-numa2=$(( 2 * lrank + 1 ))
+numa1=$((lrank))
 netdev=mlx5_${lrank}:1
 
 export CUDA_VISIBLE_DEVICES=$OMPI_COMM_WORLD_LOCAL_RANK
 export UCX_NET_DEVICES=${netdev}
-BINDING="--interleave=$numa1,$numa2"
+BINDING="--interleave=$numa1"
 
 echo "$(hostname) - $lrank device=$CUDA_VISIBLE_DEVICES binding=$BINDING"
 
diff --git a/Grid/systems/tursa/spack-bootstrap.sh b/Grid/systems/tursa/spack-bootstrap.sh
index 24c9d9c..6d928b4 100755
--- a/Grid/systems/tursa/spack-bootstrap.sh
+++ b/Grid/systems/tursa/spack-bootstrap.sh
@@ -80,7 +80,7 @@ mkdir -p build_gpu; cd build_gpu
              --enable-devel-headers --enable-examples --enable-optimizations   \
              --with-gdrcopy=${gdrcopy_path} --with-verbs --disable-logging     \
              --disable-debug --disable-assertions --enable-cma                 \
-             --with-knem=/opt/knem-1.1.4.90mlnx1/ --with-rdmacm                \
+             --with-knem=/opt/knem-1.1.4.90mlnx2/ --with-rdmacm                \
              --without-rocm --without-ugni --without-java                      \
              --enable-compiler-opt=3 --with-cuda="${cuda_path}" --without-cm   \
              --with-rc --with-ud --with-dc --with-mlx5-dv --with-dm            \
@@ -96,7 +96,7 @@ mkdir -p build_cpu; cd build_cpu
              --enable-devel-headers --enable-examples --enable-optimizations   \
              --with-verbs --disable-logging --disable-debug                    \
              --disable-assertions --enable-mt --enable-cma                     \
-             --with-knem=/opt/knem-1.1.4.90mlnx1/ --with-rdmacm                \
+              --with-knem=/opt/knem-1.1.4.90mlnx2/--with-rdmacm                \
              --without-rocm --without-ugni --without-java                      \
              --enable-compiler-opt=3 --without-cm --without-ugni --with-rc     \
              --with-ud --with-dc --with-mlx5-dv --with-dm --enable-mt --without-go
@@ -122,7 +122,7 @@ mkdir build_gpu; cd build_gpu
 ../configure --prefix="${dir}"/prefix/ompi_gpu --without-xpmem    \
              --with-ucx="${dir}"/prefix/ucx_gpu                   \
              --with-ucx-libdir="${dir}"/prefix/ucx_gpu/lib        \
-             --with-knem=/opt/knem-1.1.4.90mlnx1/                 \
+             --with-knem=/opt/knem-1.1.4.90mlnx2/                 \
              --enable-mca-no-build=btl-uct                        \
              --with-cuda="${cuda_path}" --disable-getpwuid        \
              --with-verbs --with-slurm --enable-mpi-fortran=all   \
@@ -136,7 +136,7 @@ mkdir build_cpu; cd build_cpu
 ../configure --prefix="${dir}"/prefix/ompi_cpu --without-xpmem    \
              --with-ucx="${dir}"/prefix/ucx_cpu                   \
              --with-ucx-libdir="${dir}"/prefix/ucx_cpu/lib        \
-             --with-knem=/opt/knem-1.1.4.90mlnx1/                 \
+             --with-knem=/opt/knem-1.1.4.90mlnx2/                 \
              --enable-mca-no-build=btl-uct --disable-getpwuid     \
              --with-verbs --with-slurm --enable-mpi-fortran=all   \
              --with-pmix=internal --with-libevent=internal