Slight reordering in SConstruct

Seems to address the problem reported in issue #97 for which we've
implemented workarounds so far (commits df29d2b and 106ab22)

SConstruct

@@ -9,6 +9,7 @@ import commands
 import SCons
 import time
 import subprocess
+import configure
 
 def rootcint(target,source,env):
 	"""Executes the ROOT dictionary generator over a list of headers."""
@@ -39,6 +40,8 @@ print('!!! Building the Hall A analyzer and libraries with SCons requires')
 print('!!! SCons version 2.1.0 or newer.')
 EnsureSConsVersion(2,1,0)
 
+configure.config(baseenv,ARGUMENTS)
+
 ####### Hall A Build Environment #############
 #
 baseenv.Append(MAIN_DIR = Dir('.').abspath)
@@ -155,9 +158,6 @@ baseenv.Append(BUILDERS = {'RootCint': bld})
 
 ######## Configure Section #######
 
-import configure
-configure.config(baseenv,ARGUMENTS)
-
 Export('baseenv')
 
 conf = Configure(baseenv)