[chip/make] put build artifacts in separate dirs

1 files changed, 2 insertions, 1 deletions

diff --git a/chip/make b/chip/make
index d1d8b35..b24b62e 100755
--- a/chip/make
+++ b/chip/make
@@ -86,8 +86,9 @@ data App = App
   , entrypoint :: String
   }
 
+-- | common build options.
 ghcopts :: String
-ghcopts = "-odir bild/ -hidir bild/ -Wall"
+ghcopts = "-odir bild/o -hidir bild/hi -Wall"
 
 -- | compile with ghc.
 apex :: App -> IO ()