--- SConstruct~
+++ SConstruct
@@ -19,7 +19,12 @@ AddOption('--fullstatic', action='store_
 
 # Set libraries used by all configurations and all binaries in rlvm.
 env = Environment(
+  ENV=os.environ,
   tools = ["default", "rlvm"],
+  **dict((k, v.split()) for k, v in ARGUMENTS.iteritems())
+)
+
+env.Append(
 
   LIBS = ["z"],
 
@@ -314,7 +311,6 @@ if GetOption('release'):
   # Now add release optimizations to the environment
   env.Append(
     CPPFLAGS = [
-      "-Os",
       "-DNDEBUG",
       "-DBOOST_DISABLE_ASSERTS"
     ]
@@ -360,13 +356,7 @@ elif GetOption('pprof'):
              "profiler"]
   )
 else:
-  # Add debugging flags to all binaries here
-  env.Append(
-    CPPFLAGS = [
-      "-g",
-      "-O0"
-    ]
-  )
+  pass
 
 # Cross platform core of rlvm. Produces librlvm.a and libsystem_sdl.a
 env.SConscript("SConscript",