diff --git a/toolchains/foss2021a-cuda-mpi/spack.yaml b/toolchains/foss2021a-cuda-mpi/spack.yaml
index 5e446ecdb3bb9ffefd1d6c3cf16d95c62fee4805..1958084a667a51638320e3803526dc6961a765b3 100644
--- a/toolchains/foss2021a-cuda-mpi/spack.yaml
+++ b/toolchains/foss2021a-cuda-mpi/spack.yaml
@@ -33,7 +33,7 @@ spack:
     - etsf-io@1.0.4
     - bigdft-futile@1.9.2+mpi
     - bigdft-psolver@1.9.2+mpi~cuda  # octopus does not use cuda variant
-    - dftbplus@21.2~arpack~dftd3~elsi~gpu+mpi~sockets~transport+api+sharedlibs~openmp  # non gpu and non openmp variant based on the easybuild configuration (octopus does not use gpu variant)
+    - dftbplus@21.2~arpack~dftd3~elsi~gpu~mpi~sockets~transport+api+sharedlibs~openmp # non gpu and non openmp variant based on the easybuild configuration (octopus does not use gpu variant) non mpi based on Franco's suggestion
     - perl-yaml@1.27
     # - openblas@0.3.15
     # - libpspio@0.2.4  # missing in spack
diff --git a/toolchains/foss2021a-mpi/spack.yaml b/toolchains/foss2021a-mpi/spack.yaml
index 81f2d1dddf489debe03991248f40f71d2a74df58..b1285d0be67b03d536df75036c9531ec982890ca 100644
--- a/toolchains/foss2021a-mpi/spack.yaml
+++ b/toolchains/foss2021a-mpi/spack.yaml
@@ -32,7 +32,7 @@ spack:
     - etsf-io@1.0.4
     - bigdft-futile@1.9.2+mpi
     - bigdft-psolver@1.9.2+mpi
-    - dftbplus@21.2~arpack~dftd3~elsi~gpu+mpi~sockets~transport+api+sharedlibs~openmp
+    - dftbplus@21.2~arpack~dftd3~elsi~gpu~mpi~sockets~transport+api+sharedlibs~openmp  # non gpu and non openmp variant based on the easybuild configuration (octopus does not use gpu variant) non mpi based on Franco's suggestion
     - perl-yaml@1.27
     # - openblas@0.3.15
     # - libpspio@0.2.4  # missing in spack
diff --git a/toolchains/foss2022a-cuda-mpi/spack.yaml b/toolchains/foss2022a-cuda-mpi/spack.yaml
index b01f24960b4f9b597718dff8af61cc378ca41073..60fe996f86c13587901b823c3fe0aa2f8765f9bc 100644
--- a/toolchains/foss2022a-cuda-mpi/spack.yaml
+++ b/toolchains/foss2022a-cuda-mpi/spack.yaml
@@ -33,7 +33,7 @@ spack:
     - etsf-io@1.0.4
     - bigdft-futile@1.9.2+mpi
     - bigdft-psolver@1.9.2+mpi~cuda  # octopus does not use cuda variant
-    - dftbplus@21.2~arpack~dftd3~elsi~gpu+mpi~sockets~transport+api+sharedlibs~openmp # non gpu and non openmp variant based on the easybuild configuration (octopus does not use gpu variant)
+    - dftbplus@21.2~arpack~dftd3~elsi~gpu~mpi~sockets~transport+api+sharedlibs~openmp # non gpu and non openmp variant based on the easybuild configuration (octopus does not use gpu variant) non mpi based on Franco's suggestion
     - perl-yaml@1.27
     # - openblas@0.3.15
     # - libpspio@0.2.4  # missing in spack
diff --git a/toolchains/foss2022a-mpi/spack.yaml b/toolchains/foss2022a-mpi/spack.yaml
index 09510ff13fac965694344154c5c20bcd19dea56d..44e92735b58e2b8cd461bb788c696bfe9279104a 100644
--- a/toolchains/foss2022a-mpi/spack.yaml
+++ b/toolchains/foss2022a-mpi/spack.yaml
@@ -32,7 +32,7 @@ spack:
     - etsf-io@1.0.4
     - bigdft-futile@1.9.2+mpi
     - bigdft-psolver@1.9.2+mpi
-    - dftbplus@21.2~arpack~dftd3~elsi~gpu+mpi~sockets~transport+api+sharedlibs~openmp
+    - dftbplus@21.2~arpack~dftd3~elsi~gpu~mpi~sockets~transport+api+sharedlibs~openmp  # non gpu and non openmp variant based on the easybuild configuration (octopus does not use gpu variant) non mpi based on Franco's suggestion
     - perl-yaml@1.27
     # - openblas@0.3.15
     # - libpspio@0.2.4  # missing in spack