diff --git a/Makefile b/Makefile
index b0d83b2..c0feaf1 100644
--- a/Makefile
+++ b/Makefile
@@ -1,4 +1,4 @@
-default: image
+default: docker-integer-gmp docker-integer-simple
 
 root:
 	@mkdir root
@@ -49,10 +49,13 @@ root/usr/lib/x86_64-linux-gnu/gconv/gconv-modules.cache: | root/usr/lib/x86_64-l
 root/usr/lib/x86_64-linux-gnu/libgmp.so.10: | root/usr/lib/x86_64-linux-gnu
 	@cp -L /usr/lib/x86_64-linux-gnu/libgmp.so.10 root/usr/lib/x86_64-linux-gnu/
 
-image: | root/bin/sh root/lib/x86_64-linux-gnu/libc.so.6 root/lib/x86_64-linux-gnu/libdl.so.2 root/lib/x86_64-linux-gnu/libm.so.6 root/lib/x86_64-linux-gnu/libpthread.so.0 root/lib/x86_64-linux-gnu/librt.so.1 root/lib/x86_64-linux-gnu/libutil.so.1 root/lib/x86_64-linux-gnu/libz.so.1 root/lib64/ld-linux-x86-64.so.2 root/usr/lib/x86_64-linux-gnu/gconv/UTF-16.so root/usr/lib/x86_64-linux-gnu/gconv/UTF-32.so root/usr/lib/x86_64-linux-gnu/gconv/UTF-7.so root/usr/lib/x86_64-linux-gnu/gconv/gconv-modules root/usr/lib/x86_64-linux-gnu/gconv/gconv-modules.cache root/usr/lib/x86_64-linux-gnu/libgmp.so.10
-	@tar -cC root .|docker import - haskell-scratch
+docker-integer-gmp: | root/bin/sh root/lib/x86_64-linux-gnu/libc.so.6 root/lib/x86_64-linux-gnu/libdl.so.2 root/lib/x86_64-linux-gnu/libm.so.6 root/lib/x86_64-linux-gnu/libpthread.so.0 root/lib/x86_64-linux-gnu/librt.so.1 root/lib/x86_64-linux-gnu/libutil.so.1 root/lib/x86_64-linux-gnu/libz.so.1 root/lib64/ld-linux-x86-64.so.2 root/usr/lib/x86_64-linux-gnu/gconv/UTF-16.so root/usr/lib/x86_64-linux-gnu/gconv/UTF-32.so root/usr/lib/x86_64-linux-gnu/gconv/UTF-7.so root/usr/lib/x86_64-linux-gnu/gconv/gconv-modules root/usr/lib/x86_64-linux-gnu/gconv/gconv-modules.cache root/usr/lib/x86_64-linux-gnu/libgmp.so.10
+	@tar -cC root .|docker import - haskell-scratch:integer-gmp
+
+docker-integer-simple: | root/bin/sh root/lib/x86_64-linux-gnu/libc.so.6 root/lib/x86_64-linux-gnu/libdl.so.2 root/lib/x86_64-linux-gnu/libm.so.6 root/lib/x86_64-linux-gnu/libpthread.so.0 root/lib/x86_64-linux-gnu/librt.so.1 root/lib/x86_64-linux-gnu/libutil.so.1 root/lib/x86_64-linux-gnu/libz.so.1 root/lib64/ld-linux-x86-64.so.2 root/usr/lib/x86_64-linux-gnu/gconv/UTF-16.so root/usr/lib/x86_64-linux-gnu/gconv/UTF-32.so root/usr/lib/x86_64-linux-gnu/gconv/UTF-7.so root/usr/lib/x86_64-linux-gnu/gconv/gconv-modules root/usr/lib/x86_64-linux-gnu/gconv/gconv-modules.cache
+	@tar -c --exclude=libgmp.so.10 -C root .|docker import - haskell-scratch:integer-simple
 
 clean:
 	@rm -rf root
 
-.PHONY: default image clean
+.PHONY: default docker-integer-gmp docker-integer-simple clean
diff --git a/example/Dockerfile b/example/Dockerfile
index 90f4bac..e9fe0c8 100644
--- a/example/Dockerfile
+++ b/example/Dockerfile
@@ -1,6 +1,6 @@
 #-*- mode:conf; -*-
 
-FROM haskell-scratch
+FROM haskell-scratch:integer-gmp
 
 ADD hello /usr/bin/hello
 CMD hello