When trying to update my Homebrew install, I was getting this error when building gnutls:

Error: Failed executing: make install
Please report this bug: https://github.com/mxcl/homebrew/wiki/new-issue
These existing issues may help you:
https://github.com/mxcl/homebrew/issues/#issue/4236

The Github page linked does have the answer, but I missed it for a while because I didn’t scroll down to the money post. The answer is to paste the following into your terminal:

for dep in $(brew deps gnutls); do brew remove –force $dep; done
brew install gnutls

Thank you, jabley.