diff --git a/spack.yaml b/spack.yaml
index 125d61a5c55461eed95873979a3a0955de0a489e..a8f3e18f090aad71d3b94a0ff14e660caa2a475a 100644
--- a/spack.yaml
+++ b/spack.yaml
@@ -22,4 +22,4 @@ spack:
     - tvb-storage ^binutils+ld+gold %gcc@10.3.0
     - tvb-framework ^binutils+ld+gold %gcc@10.3.0
     - meta-brainscales %gcc@10.3.0
-    #- pynn-brainscales %gcc@10.3.0
+    - pynn-brainscales %gcc@10.3.0