Brew install node error?

Error: Could not symlink share/systemtap/tapset/node.stp
/usr/local/share/systemtap/tapset is not writable.

I get this error trying to install node using brew, how do I fix it? I've heard about using sudo and other methods, but I know some of these methods can lead to future problems, so I want to make sure I'm doing the right fix.

thank

via koz