[GRASS-user] G.extension failure, suse 12.1, GRASS 6.4.3svn

[Lars Forseth]

hi!
I'm trying to use g.extension to install som extensions in GRASS 
6.4.3svn under SuSE 12.1. But having trouble:

"g.extension.py extension=v.in.geoplot 
svnurl=http://svn.osgeo.org/grass/grass-addons/grass6
Fetching <v.in.geoplot> from GRASS-Addons SVN (be patient)...
Compiling...
/opt/grass/include/Make/Module.make:25: warning: overriding
recipe for target `install'
/opt/grass/include/Make/Rules.make:90: warning: ignoring old
recipe for target `install'
/opt/grass/include/Make/Module.make:25: warning: overriding
recipe for target `install'
/opt/grass/include/Make/Rules.make:90: warning: ignoring old
recipe for target `install'
main.c:27:23: fatal error: grass/gis.h: No such file or
directory
compilation terminated.
make: *** [OBJ.i686-pc-linux-gnu/main.o] Error 1
ERROR: Compilation failed, sorry. Please check above error messages.
(Fri Nov 23 19:46:33 2012) Command finished (6 sec)  "

Any ideas?

Regards larsf