[GRASS-user] Problems installing extensions on GRASS GIS 7.1 SVN in Lubuntu 15.04

Fri Nov 6 09:09:41 PST 2015

Hello,
I'm having troubles installing extensions with the g.extension. Follow the
message:

(Fri Nov  6 14:39:50
2015)
g.extension extension=v.class.mlpy
url=
Fetching <v.class.mlpy> from GRASS GIS Addons repository (be patient)...
Compiling...
ERROR: Please install GRASS development package
(Fri Nov  6 14:39:56 2015) Comando terminado (5 sec)

Someone could help me?
Thanks!
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