diff --git a/Makefile b/Makefile
index 45845cf4..36ec57c0 100644
--- a/Makefile
+++ b/Makefile
@@ -1,6 +1,8 @@
 CC=gcc
 
-all: build-lib build-main run
+all: build run
+
+build: build-lib build-main
 
 build-main:
 	$(CC) -Wall -o bin/picrin -I./include -L./lib -lpicrin -lreadline etc/main.c
diff --git a/README.md b/README.md
index b8bab694..022b178a 100644
--- a/README.md
+++ b/README.md
@@ -25,7 +25,7 @@ https://github.com/wasabiz/picrin
 
 		$ make build
 
-	built executable binary will be under bin/ directory.
+	built executable binary will be under bin/ directory and shared library `libpicrin.so` under lib/.
 
 - run