XXX stack/slapos: try a setuptools hack which rejects setup_requires

with jerome/setuptools@54f42c38 applied

stack/slapos.cfg

@@ -42,6 +42,7 @@ 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/
+  https://lab.nexedi.com/jerome/setuptools/raw/10083a712d25f7020b5094d8098c800fcf3d4a0c/dist/setuptools-44.0.0.post20210217.zip
 
 # Use only quite well working sites.
 allow-hosts +=
@@ -61,6 +62,7 @@ allow-hosts +=
   sourceforge.net
   www.dabeaz.com
   www.owlfish.com
+  lab.nexedi.com
 
 # Use an https index
 index = https://pypi.org/simple/
@@ -140,7 +142,7 @@ eggs =
   slapos.libnetworkcache
 
 [versions]
-setuptools = 44.0.0
+setuptools = 44.0.0.post20210217
 # Use SlapOS patched zc.buildout
 zc.buildout = 2.7.1+slapos010
 # Use SlapOS patched zc.recipe.egg (zc.recipe.egg 2.x is for Buildout 2)