It may be possible.

The original location only provides the latest source in a zip ( http://people.mozilla.org/~jkew/woff/woff-code-latest.zip ) which makes versioning a bit confusing. If the author updated the zip file, there would be no record of changes, and the sha1 would not match the formula.

I was also not satisfied with the existing Makefile. It did not have a mechanism for installing the built binaries, which I believed should be part of the build script rather than the formula.