exo v2.x : exo-portal build failure due to cyclic reference

[r.legall@xxxxxxxxxxx]

Hello,

I'm trying to build the last svn source code of exo v2.x. I follow the 
building guide on the exo platform docs website 
(http://docs.exoplatform.org/exo-documents/exo.site/developer/build.html)
I have an issue with exo-portal module: 
[INFO] Scanning for projects...
[INFO] 
------------------------------------------------------------------------
[ERROR] BUILD FAILURE
[INFO] 
------------------------------------------------------------------------
[INFO] The projects in the reactor contain a cyclic reference: Edge between 
'Ver
tex{label='exo-portal:exo-portal.portal.config'}' and 
'Vertex{label='exo-portal:
exo-portal.jsf.core-components'}' introduces to cycle in the graph 
exo-portal:ex
o-portal.jsf.core-components --> exo-portal:exo-portal.portal.api --> 
exo-portal
:exo-portal.portal.config --> exo-portal:exo-portal.jsf.core-components

I tried to remove dependencies but I don't succeed to build the module.

Do you have any idea to solve this issue?
Do I need to use another source code tag?

Regards
Rodrigue Le Gall