diff --git a/build/rpm/build_spec.sh b/build/rpm/build_spec.sh
index 0633fc7..c50c0b1 100755
--- a/build/rpm/build_spec.sh
+++ b/build/rpm/build_spec.sh
@@ -13,7 +13,7 @@ echo "Group: Applications/Internet" >> zjunet.spec
 echo "URL: https://github.com/QSCTech/zjunet/" >> zjunet.spec
 echo "Vendor: Qiu Shi Chao Website of Zhejiang University" >> zjunet.spec
 echo "Packager: Senorsen <sen@senorsen.com>" >> zjunet.spec
-echo "Requires: xl2tpd >= 1.3.1, curl, dnsutils" >> zjunet.spec
+echo "Requires: xl2tpd >= 1.3.1, curl, bind-tools" >> zjunet.spec
 echo "BuildRoot:  %{_builddir}/%{name}-root" >> zjunet.spec
 echo "Source: %{name}-%{version}.tar.gz" >> zjunet.spec
 echo "BuildArch: noarch" >> zjunet.spec
diff --git a/install.sh b/install.sh
index 9911f4d..b5bad2d 100755
--- a/install.sh
+++ b/install.sh
@@ -1,12 +1,23 @@
 #!/bin/sh
 
+set -e
+
 BASEDIR=$(dirname $0)/lib
-mkdir -p /usr/local/lib/zjunet
-cp -rf $BASEDIR/* /usr/local/lib/zjunet
-mkdir -p /usr/local/bin
-echo "#!/bin/sh" > /usr/local/bin/zjunet
-echo '/usr/local/lib/zjunet/zjunet.sh "$@"' >> /usr/local/bin/zjunet
-chmod +x /usr/local/bin/zjunet
+if [ -z "$PREFIX" ]; then
+	PREFIX=/usr/local
+fi
+
+mkdir -p $PREFIX/lib/zjunet
+cp -rf $BASEDIR/* $PREFIX/lib/zjunet
+mkdir -p $PREFIX/bin
+mkdir -p $PREFIX/share/zjunet
+ln -fs ../../share/zjunet/VERSION $PREFIX/lib/zjunet/VERSION
+cp -f VERSION $PREFIX/share/zjunet
+cat > $PREFIX/bin/zjunet << EOF
+#!/bin/sh
+$PREFIX/lib/zjunet/zjunet.sh "\$@"
+EOF
+chmod +x $PREFIX/bin/zjunet
 echo "[INFO] Done."
 echo
 zjunet usage
diff --git a/lib/zjunet.sh b/lib/zjunet.sh
index 0e6493f..41d619d 100755
--- a/lib/zjunet.sh
+++ b/lib/zjunet.sh
@@ -19,7 +19,7 @@
 # <http://www.gnu.org/licenses/>.
 
 BASEDIR=$(dirname $0)
-MISCELLDIR="/usr/share/zjunet"
+MISCELLDIR="$BASEDIR/../../share/zjunet"
 
 case "$1" in
     route)