diff --git a/spack.yaml b/spack.yaml
index 4ac1b4ee809f7efaa3f620edb7477d9800398f63..932021cf96ad6d59c0830369bb08dc1edb46ab70 100644
--- a/spack.yaml
+++ b/spack.yaml
@@ -29,7 +29,7 @@ spack:
     - py-tvb-library
     - py-tvb-storage
     - py-tvb-framework
-    - pynn-brainscales@4.0-a4
+    # - pynn-brainscales@4.0-a4
     - hxtorch@4.0-a4
     - py-neo
     - py-hdmf