diff --git a/spack.yaml b/spack.yaml
index c76f680794d209c66ac7c010cef3a23e9f696078..0bd507e2661ba0e4aa4766c4877e5fb95e30347a 100644
--- a/spack.yaml
+++ b/spack.yaml
@@ -28,7 +28,7 @@ spack:
     - py-formencode
     - tvb-framework ^binutils+ld+gold
     - pynn-brainscales@2.0-rc1 ^log4cxx@0.10.0 ^googletest@1.11.0:+gmock
-    #- oppulance@2.0-rc1
+    - oppulance@2.0-rc1
     #- py-cerebstats
     #- py-cerebunit
     - py-cerebrus