diff --git a/bin/arc b/bin/arc
--- a/bin/arc
+++ b/bin/arc
@@ -1,14 +1,16 @@
-#!/usr/bin/env bash
+#!/bin/sh
 
 # NOTE: This file is a wrapper script instead of a symlink so it will work in
 # the Git Bash environment in Windows.
 
-# Do bash magic to resolve the real location of this script through aliases,
+# Do shell magic to resolve the real location of this script through aliases,
 # symlinks, etc.
-SOURCE="${BASH_SOURCE[0]}";
+SOURCE="$0";
 while [ -h "$SOURCE" ]; do
   LINK="$(readlink "$SOURCE")";
-  if [ "${LINK:0:1}" == "/" ]; then
+  # Test if the first character of $LINK is / by removing it from the front
+  # and testing equality
+  if [ "${LINK#/}" != "$LINK" ]; then
     # absolute symlink
     SOURCE="$LINK"
   else