diff --git a/SConstruct b/SConstruct

index ee6ab3c..2bb8a03 100644

--- a/SConstruct

+++ b/SConstruct

@@ -47,15 +47,15 @@ debug = buildmode == "debug"

 Export('debug')

 import SCons.Util

-if os.environ.has_key('CC'):

+if 'CC' in os.environ:

 	env['CC'] = os.environ['CC']

-if os.environ.has_key('CFLAGS'):

+if 'CFLAGS' in os.environ:

 	env['CCFLAGS'] += SCons.Util.CLVar(os.environ['CFLAGS'])

-if os.environ.has_key('CXX'):

+if 'CXX' in os.environ:

 	env['CXX'] = os.environ['CXX']

-if os.environ.has_key('CXXFLAGS'):

+if 'CXXFLAGS' in os.environ:

 	env['CXXFLAGS'] += SCons.Util.CLVar(os.environ['CXXFLAGS'])

-if os.environ.has_key('LDFLAGS'):

+if 'LDFLAGS' in os.environ:

 	env['LINKFLAGS'] += SCons.Util.CLVar(os.environ['LDFLAGS'])

 if (sys.platform != "win32" and env['gcc_visibility']): 

@@ -163,7 +163,7 @@ Export('have_sse')

 lib_dir = '.'

 plugins_dir = ''

 try : 

-	version_file = file('.svnversion', 'r')

+	version_file = open('.svnversion', 'r')

 	try : 

 		version = version_file.readline().strip()

 		prefix = env['prefix']

@@ -191,7 +191,7 @@ try :

 	except: 

 		info = sys.exc_info()

-		print "%s %s %s" %(info[0], info[1], info[2])

+		print("%s %s %s" %(info[0], info[1], info[2]))

 except : 

 	svnversion = os.popen('svnversion -n .', 'r')

 	version = svnversion.readline().strip()

@@ -232,29 +232,29 @@ Export('lib_dir')

 Export('plugins_dir')

 version = '0.9.%s' %version

-print "version: %s" %version

+print("version: %s" %version)

 bt_sublibs = ['mrt', 'sdlx', 'objects', 'clunk']

 env.Append(CPPPATH=['#'])

 if (os.path.exists('private')):

 	dir = 'private'

-	BuildDir('#/build/' + buildmode + '/' + dir, dir, 0)

+	VariantDir('#/build/' + buildmode + '/' + dir, dir, 0)

 	SConscript('#/build/' + buildmode + '/' + dir + '/SConscript')	

 for dir in bt_sublibs:

-	BuildDir('#/build/' + buildmode + '/' + dir, dir, 0)

+	VariantDir('#/build/' + buildmode + '/' + dir, dir, 0)

 	SConscript('#/build/' + buildmode + '/' + dir + '/SConscript')

 for dir in bt_sublibs:

 	env.Append(LIBPATH=['#/build/' + buildmode + '/' + dir])

-env.BuildDir('#/build/' + buildmode + '/editor', 'editor', 0)

+env.VariantDir('#/build/' + buildmode + '/editor', 'editor', 0)

 SConscript('#/build/' + buildmode + '/editor/SConscript')

 env.Append(LIBPATH=['#/build/' + buildmode + '/engine'])

-env.BuildDir('#/build/' + buildmode + '/engine', 'engine', 0)

+env.VariantDir('#/build/' + buildmode + '/engine', 'engine', 0)

 SConscript('#/build/' + buildmode + '/engine/' + 'SConscript')

 if len(install_targets) > 0: