diff --git a/toolchains/foss2021a-cuda-mpi/spack.yaml b/toolchains/foss2021a-cuda-mpi/spack.yaml
index 8131e6d8e048933e081351c008794140bd4b934c..ec6cd83dbe16c2535e74daeda0bb54ed54852020 100644
--- a/toolchains/foss2021a-cuda-mpi/spack.yaml
+++ b/toolchains/foss2021a-cuda-mpi/spack.yaml
@@ -34,6 +34,7 @@ spack:
     - 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)
+    - perl-yaml-tiny@1.73
     # - openblas@0.3.15
     # - libpspio@0.2.4  # missing in spack
   specs:
diff --git a/toolchains/foss2021a-mpi/spack.yaml b/toolchains/foss2021a-mpi/spack.yaml
index 4cb046d7fdd12a3ef9ea8b13d9d7e0b1cc35a09f..c406c70453f90b25941f46ac8a21edfc109c98fe 100644
--- a/toolchains/foss2021a-mpi/spack.yaml
+++ b/toolchains/foss2021a-mpi/spack.yaml
@@ -33,6 +33,7 @@ spack:
     - 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
+    - perl-yaml-tiny@1.73
     # - openblas@0.3.15
     # - libpspio@0.2.4  # missing in spack
   specs:
diff --git a/toolchains/foss2021a-serial/spack.yaml b/toolchains/foss2021a-serial/spack.yaml
index 5e32599ada4ad367b8c17e9d0312434e366f691a..e37eb12a9686d55021d7b7da1144c4dd25497fd9 100644
--- a/toolchains/foss2021a-serial/spack.yaml
+++ b/toolchains/foss2021a-serial/spack.yaml
@@ -26,6 +26,7 @@ spack:
     - bigdft-futile@1.9.2~mpi
     - bigdft-psolver@1.9.2~mpi~scalapack
     - dftbplus@21.2~arpack+dftd3~elsi~gpu~mpi~sockets~transport+api+sharedlibs~openmp
+    - perl-yaml-tiny@1.73
 
     # - 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 8181c70d9356f4b5984f9c0f300caf5b59347b29..ecd3374350ddd172b7a264cff5da22867a8c7a4d 100644
--- a/toolchains/foss2022a-cuda-mpi/spack.yaml
+++ b/toolchains/foss2022a-cuda-mpi/spack.yaml
@@ -34,6 +34,7 @@ spack:
     - 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)
+    - perl-yaml-tiny@1.73
     # - openblas@0.3.15
     # - libpspio@0.2.4  # missing in spack
   specs:
diff --git a/toolchains/foss2022a-mpi/spack.yaml b/toolchains/foss2022a-mpi/spack.yaml
index 83ee9d194db8c88c96797a5c49dcb37f7c0f9ab8..d17857432290716be802992c10a3a854f0f45ebc 100644
--- a/toolchains/foss2022a-mpi/spack.yaml
+++ b/toolchains/foss2022a-mpi/spack.yaml
@@ -33,6 +33,7 @@ spack:
     - 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
+    - perl-yaml-tiny@1.73
     # - openblas@0.3.15
     # - libpspio@0.2.4  # missing in spack
   specs:
diff --git a/toolchains/foss2022a-serial/spack.yaml b/toolchains/foss2022a-serial/spack.yaml
index 023215267e3315f473cfe951729fb7ba64b10340..e9fcbe1565fabc0ee39f9e4317bba4953e4ad05c 100644
--- a/toolchains/foss2022a-serial/spack.yaml
+++ b/toolchains/foss2022a-serial/spack.yaml
@@ -27,6 +27,7 @@ spack:
     - bigdft-futile@1.9.2~mpi
     - bigdft-psolver@1.9.2~mpi~scalapack
     - dftbplus@21.2~arpack+dftd3~elsi~gpu~mpi~sockets~transport+api+sharedlibs~openmp
+    - perl-yaml-tiny@1.73
     # - flexiblas@3.0.4
     # - libpspio@0.2.4  # missing in spack
   specs: