Fix #469

README.md

@@ -88,7 +88,7 @@ section below.
 ``` bash
 cd shadowsocks-libev
 sudo apt-get install build-essential autoconf libtool libssl-dev \
-    gawk debhelper dh-systemd init-system-helpers
+    gawk debhelper dh-systemd init-system-helpers pkg-config
 dpkg-buildpackage -us -uc -i
 cd ..
 sudo dpkg -i shadowsocks-libev*.deb