XXX try out nexedi/slapos.core!242

stack/slapos.cfg

@@ -41,6 +41,7 @@ find-links +=
   http://www.nexedi.org/static/packages/source/
   http://www.nexedi.org/static/packages/source/hexagonit.recipe.download/
   http://www.nexedi.org/static/packages/source/slapos.buildout/
+  ${:_profile_base_location_}/slapos.core-1.6.1.dev0.tar.gz
 
 # Use only quite well working sites.
 allow-hosts +=
@@ -60,6 +61,7 @@ allow-hosts +=
   sourceforge.net
   www.dabeaz.com
   www.owlfish.com
+  lab.nexedi.com
 
 # Use an https index
 index = https://pypi.org/simple/
@@ -160,7 +162,7 @@ pytz = 2016.10
 requests = 2.24.0
 six = 1.12.0
 slapos.cookbook = 1.0.152
-slapos.core = 1.6.0
+slapos.core = 1.6.1.dev0
 slapos.extension.strip = 0.4
 slapos.extension.shared = 1.0
 slapos.libnetworkcache = 0.20