We saw this study and noticed that our OSDI ’12 paper on Dissent was in it, marked “Build fails”. Upon very quick inspection of the Build notes for that line, it appears clear that whoever tried to do this build simply did not install the required dependencies, namely Qt and CryptoPP. It looks like they installed one qt3 package, but that's an old version of Qt, perhaps before Qt had header files named simply "QObject" rather than "QObject.h" for example. Try simply using a recent version of Qt (version 4), and a complete install. - Bryan Ford, bryan.ford@yale.edu