""")
test.write('SConstruct', """
-B = Builder(name = "B", action = r'%s build.py $targets $sources')
+B = Builder(name = "B", action = r'%s build.py $TARGETS $SOURCES')
env = Environment(BUILDERS = [B])
env.B(target = 'f1.out', source = 'f1.in')
env.B(target = 'f2.out', source = 'f2.in')