diff --git a/bob/devtools/bootstrap.py b/bob/devtools/bootstrap.py
index 82e5cb57084d229544b8a91b81ea0dfc30dd80a5..27f7a264e7b04d70cd8164871004ab26b0a75d85 100644
--- a/bob/devtools/bootstrap.py
+++ b/bob/devtools/bootstrap.py
@@ -6,7 +6,7 @@
 
 
 _BASE_CONDARC = '''\
-default_channels:
+default_channels: #!final
   - https://repo.anaconda.com/pkgs/main
   - https://repo.anaconda.com/pkgs/free
 add_pip_as_python_dependency: false #!final