managing class paths on different operating systems

I use git as my SCM and I use both Ubuntu and Mac OSX. The home directory of the two operating systems are different and there lies the problem. When I commit the .classpath to version control, it looks something like this:

Java Code:

 <classpath>
        <classpathentry kind="src" path="src"/>
        <classpathentry kind="con" path="org.eclipse.jdt.launching.JRE_CONTAINER"/>
        <classpathentry kind="lib" path="/Users/MyUser/Documents/github/Gateway/GDGateway/java-json.jar"/>
        <classpathentry kind="lib" path="/Users/MyUser/Documents/github/Gateway/GDGateway/postgresql-9.3-1101.jdbc41.jar"/>
        <classpathentry kind="output" path="bin"/>
 </classpath>

Now when I update my project on Ubuntu. I have to change the build path again because it is referencing paths on OSX. And this goes back and forth. Rather than remove this file from git with .gitignore, I'd prefer to use a global environment variable like as follows:

Java Code:

 <classpath>
        <classpathentry kind="src" path="src"/>
        <classpathentry kind="con" path="org.eclipse.jdt.launching.JRE_CONTAINER"/>
        <classpathentry kind="lib" path="$HOME/Documents/github/Gateway/GDGateway/java-json.jar"/>
        <classpathentry kind="lib" path="$HOME/Documents/github/Gateway/GDGateway/postgresql-9.3-1101.jdbc41.jar"/>
        <classpathentry kind="output" path="bin"/>
 </classpath>

Is this possible?