Index: Makefile
==================================================================
--- Makefile
+++ Makefile
@@ -443,10 +443,32 @@
 	@grep : Makefile | perl -ne '/^([A-Za-z0-9_-]+):/ && print "$$1\n"'
 
 
 unit :
 	cd tests;make unit
+
+#======================================================================
+# Chicken build
+#======================================================================
+
+tgz/chicken-4.13.0.tar.gz :
+	mkdir -p tgz
+	curl https://code.call-cc.org/releases/4.13.0/chicken-4.13.0.tar.gz > tgz/chicken-4.13.0.tar.gz
+
+build/chicken-4.13.0/LICENSE : tgz/chicken-4.13.0.tar.gz
+	mkdir -p build/eggs-installed
+	cd build;tar xf ../tgz/chicken-4.13.0.tar.gz
+
+build/bin/csi : build/chicken-4.13.0/LICENSE
+	cd build/chicken-4.13.0;make PLATFORM=linux
+	cd build/chicken-4.13.0;make PLATFORM=linux PREFIX=../ install
+
+EGGS=srfi-69
+EGGSTARG=$(addsuffix .done,$(addprefix build/eggs-installed/,$(EGGS)))
+
+build/eggs-installed/%.done : build/bin/csi
+	build/bin/chicken-install $* > build/eggs-installed/$*.done
 
 #======================================================================
 # Attic
 #======================================================================