To install the modules, change to the file header.inc.php at line 22
replace:
$site['build'] = 'Alpha';
by:
$site['build'] = 'dev';
--------------------------------------------
For info:
// Release state order
// '#' stands for any number
$versions = array(
'dev' => 0,
'alpha' => 1,
'a' => 1,
'beta' => 2,
'b' => 2,
'RC' => 3,
see more '#' => 4,
'p' => 5,
'pl' => 5);