I think these featires are fairly safe...
 -Erik
diff --git a/shell/lash.c b/shell/lash.c
index cbaf16e..60c51f6 100644
--- a/shell/lash.c
+++ b/shell/lash.c
@@ -26,9 +26,9 @@
  */
 
 
-//#define BB_FEATURE_SH_BACKTICKS
+#define BB_FEATURE_SH_BACKTICKS
 //#define BB_FEATURE_SH_IF_EXPRESSIONS
-//#define BB_FEATURE_SH_ENVIRONMENT
+#define BB_FEATURE_SH_ENVIRONMENT
 //#define DEBUG_SHELL