--- a/v1.1.2/bin/snow.in	
+++ a/v1.1.2/bin/snow.in	
@@ -18,7 +18,7 @@ 
 
 # Set the root directory of the site-wide Scheme Now! installation.
 
-SNOW_SITE_DIR=${SNOW_SITE_DIR:-"@SNOW_SITE_ROOT@/@SNOW_VERSION@"}
+export SNOW_SITE_DIR=${SNOW_SITE_DIR:-"@SNOW_SITE_ROOT@/@SNOW_VERSION@"}
 SNOW_BASE="${SNOW_SITE_DIR}/base"
 SNOW_MACROS="${SNOW_BASE}/snow.scm"