diff --git a/SConstruct b/SConstruct
index 1e0aaca..1ecc470 100644
--- a/SConstruct
+++ b/SConstruct
@@ -175,4 +175,3 @@ env.Package(target = 'libucore-' + version_info['version_str'] + '.tar.gz',
             X_RPM_GROUP    = 'Development/Libraries'
 )
 
-env.Default('src')
diff --git a/src/SConscript b/src/SConscript
index 7d060a3..ed74ad0 100644
--- a/src/SConscript
+++ b/src/SConscript
@@ -21,3 +21,5 @@ ucore_env.Alias('install',
     ucore_env.Install(os.path.join(prefix, 'lib'), [ucore_staticlib]))
 ucore_env.Alias('install', 
     ucore_env.InstallVersionedLib(os.path.join(prefix, 'lib'), [ucore_sharedlib]))
+
+ucore_env.Default([ucore_staticlib, ucore_sharedlib])
diff --git a/test/SConscript b/test/SConscript
index 2e42446..680c23d 100644
--- a/test/SConscript
+++ b/test/SConscript
@@ -32,4 +32,4 @@ cmd  = test_env.Command(target='test_phony' ,
                             action= test_env.Dir('.').abspath + '/' + test_executable)
 test_env.Depends(cmd, prog)
 test_env.AlwaysBuild(cmd)
-
+test_env.Default(test_executable)