diff --git a/spack.yaml b/spack.yaml
index ed9633e7881236347e8e1f6c6a4b4c19a81dd099..74ced3bf9fdf407cb7c53bceadaa9069dc693e75 100644
--- a/spack.yaml
+++ b/spack.yaml
@@ -28,8 +28,8 @@ spack:
     - py-pyaescrypt
     - py-formencode
     - tvb-framework ^binutils+ld+gold
-    - pynn-brainscales@2.0-rc5 ^log4cxx@0.10.0 ^googletest@1.11.0:+gmock
-    # - hxtorch@2.0-rc5 ^log4cxx@0.10.0 ^googletest@1.11.0:+gmock
+    - pynn-brainscales@2.0-rc6 ^log4cxx@0.10.0 ^googletest@1.11.0:+gmock
+    - hxtorch@2.0-rc6 ^log4cxx@0.10.0 ^googletest@1.11.0:+gmock
     - py-neo
     #- py-cerebstats
     #- py-cerebunit