diff --git a/environment.yml b/environment.yml
index b4613000a1a576ba1f55a04a60205d9db82b74fe..d62e48ece73127a695fcd7e0d9853957c4919ad1 100644
--- a/environment.yml
+++ b/environment.yml
@@ -13,7 +13,7 @@ dependencies:
 - ipywidgets                   # Interactive widgets
 #- rise                         # Slides
 - nbdime                       # Jupyter-git integration
-- nb_conda_kernels             # In particular for sagemath which is not installed by conda
+#- nb_conda_kernels             # In particular for sagemath which is not installed by conda
 - pip
 
 # Visual Studio (conda packages)