diff --git a/spack.yaml b/spack.yaml
index 865c103d0553c11ab2f32b6de15231ae3e10cad7..15eb0bf465a1abe7b3fdac5d4ea5dd5ad956a66d 100644
--- a/spack.yaml
+++ b/spack.yaml
@@ -53,8 +53,6 @@ spack:
     - py-lfpy@2.2.6
     - py-elephant
     - py-frites
-    - py-mmcif-pdbx
-    - py-propka
     #- py-snudda
     #- biobb-common
     #- biobb-md