diff --git a/lphobos/build.sh b/lphobos/build.sh
index cf2badc1..98960711 100755
--- a/lphobos/build.sh
+++ b/lphobos/build.sh
@@ -1,6 +1,7 @@
 #!/bin/bash
 
 echo "removing old objects"
+mkdir obj
 rm -f obj/*.bc
 rm -f ../lib/*.bc