diff --git a/setup-iojs-mavericks.bash b/setup-iojs-mavericks.bash
index 0770fd9..945d9ff 100644
--- a/setup-iojs-mavericks.bash
+++ b/setup-iojs-mavericks.bash
@@ -1,10 +1,11 @@
 IOJS_VER=${1}
+IOJS_REMOTE="http://iojs.org/dist/${IOJS_VER}/iojs-${IOJS_VER}.pkg"
+IOJS_PKG="/tmp/iojs-${IOJS_VER}.pkg"
 
 if [ -n "${IOJS_VER}" ]; then
   echo "installing io.js as iojs ${IOJS_VER}..."
-  curl -fsSL "http://iojs.org/dist/${IOJS_VER}/iojs-${IOJS_VER}.pkg" -o "/tmp/iojs-${IOJS_VER}.pkg"
-  sudo /usr/sbin/installer -pkg "/tmp/iojs-${IOJS_VER}.pkg" -target /
-
+  curl -fsSL "${IOJS_REMOTE}" -o "${IOJS_PKG}"
+  sudo /usr/sbin/installer -pkg "${IOJS_PKG}" -target /
 
   sudo chown -R $(whoami) /usr/local 2>/dev/null
 fi