--- Makefile.am.orig	2011-08-22 13:05:16.000000000 +0900
+++ Makefile.am	2011-08-22 13:05:23.000000000 +0900
@@ -15,17 +15,17 @@
 	sed -e 's!@pkgdatadir@!$(pkgdatadir)!g' migemo.el.in > $@
 
 migemo-dict: # SKK-JISYO.L
-	ruby -I. migemo-convert.rb SKK-JISYO.L > $@
+	ruby -Ke -I. migemo-convert.rb SKK-JISYO.L > $@
 
 migemo-dict.idx: migemo-dict
-	ruby -I. migemo-index.rb migemo-dict > migemo-dict.idx
+	ruby -Ke -I. migemo-index.rb migemo-dict > migemo-dict.idx
 
 migemo-dict.cache: frequent-chars migemo-dict migemo-dict.idx
-	sort frequent-chars | ruby -I. migemo-cache.rb migemo-dict
+	sort frequent-chars | ruby -Ke -I. migemo-cache.rb migemo-dict
 
 frequent-chars: genchars.sh migemo-dict
 	sh genchars.sh > tmp.list1
-	cat tmp.list1 | ruby -rromkan -ne 'puts $$_.to_kunrei' > tmp.list2
+	cat tmp.list1 | ruby -Ke -rromkan -ne 'puts $$_.to_kunrei' > tmp.list2
 	cat tmp.list1 tmp.list2 | sort | uniq > frequent-chars
 
 clean-local: