diff --git a/ChangeLog b/ChangeLog
index d265fa84a8..f75318620b 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,11 @@
+Thu Oct 16 14:34:16 2008  Nobuyoshi Nakada  <nobu@ruby-lang.org>
+
+	* common.mk, enc/depend (enc, trans): targets for sources.
+
+Thu Oct 16 14:30:30 2008  Nobuyoshi Nakada  <nobu@ruby-lang.org>
+
+	* instruby.rb (lib): installs all files other than README etc.
+
 Thu Oct 16 06:20:36 2008  Yukihiro Matsumoto  <matz@ruby-lang.org>
 
 	* test/ruby/test_transcode.rb (TestTranscode#test_errors):
diff --git a/common.mk b/common.mk
index 84b7460ed9..c4273f1945 100644
--- a/common.mk
+++ b/common.mk
@@ -384,8 +384,11 @@ $(RBCONFIG): $(srcdir)/mkconfig.rb config.status $(PREP)
 		-install_name=$(RUBY_INSTALL_NAME) \
 		-so_name=$(RUBY_SO_NAME) rbconfig.rb
 
-encs: $(ENC_MK) $(LIBRUBY) $(PREP) transdb.h
-	$(MAKE) -f $(ENC_MK) MINIRUBY="$(MINIRUBY)" $(MFLAGS)
+encs enc trans: $(ENC_MK) $(LIBRUBY) $(PREP)
+	$(MAKE) -f $(ENC_MK) RUBY="$(MINIRUBY)" MINIRUBY="$(MINIRUBY)" $(MFLAGS) $@
+
+enc: {$(VPATH)}encdb.h
+trans: {$(VPATH)}transdb.h
 
 $(ENC_MK): $(srcdir)/enc/make_encmake.rb $(srcdir)/enc/Makefile.in $(srcdir)/enc/depend \
 	$(srcdir)/lib/mkmf.rb $(RBCONFIG)
diff --git a/enc/depend b/enc/depend
index 1ae1d71a6e..77160482b1 100644
--- a/enc/depend
+++ b/enc/depend
@@ -62,7 +62,10 @@ TRANSCLEANOBJS = <%=cleanobjs.map {|clean|
   clean.gsub(/\$\*(\.\w+)?/) {"$(TRANSOBJS#{$1 ? ":.#{CONFIG["OBJEXT"]}=#{$1}" : ""})"}
 }.join(" ")%>
 
-all: $(ENCSOS) $(TRANSSOS)
+encs: all
+all: enc trans
+enc: $(ENCSOS)
+trans: $(TRANSSOS)
 
 srcs: $(TRANSCSRCS)