diff --git a/spack.yaml b/spack.yaml
index dde77f566eb40b17785b2ef9ae797deaba30d647..af23ac79956e4df1873b2844b18f68136534e123 100644
--- a/spack.yaml
+++ b/spack.yaml
@@ -19,6 +19,9 @@ spack:
     - py-nameparser %gcc@10.3.0
     #- py-version-query %gcc@10.3.0
     # EBRAINS simulators
+    - apbs %gcc@10.3.0
+    - py-pdb2pqr %gcc@10.3.0
+    - sda@7.3.3c %gcc@9.4.0
     - nest@3.2 +python +gsl +mpi %gcc@10.3.0
     - arbor +python +mpi ^python@3:3.9 %gcc@10.3.0
     - neuron +mpi %gcc@10.3.0