Plugins fail to load in 0.9.4 on Ubuntu

All plugins requiring the Qt API, it seems, fail when MuseScore 0.9.4 is loading on ubuntu. I've tried to load the console and abc_imports plugin with the following errors.

Error loading plugin
"/usr/share/mscore-0.9/plugins/console.js" line 86:
ReferenceError: QMainWindow is not defined

Error loading plugin
"/usr/share/mscore-0.9/plugins/abc_import.js" line 51:
ReferenceError: QDir is not defined

I've tried to compile my own mscore from the stable 0.9.5 sources but that fails when it comes to build that fails also, which I suspect has something else to do with Qt. Build error pasted below.

Linking CXX shared library libqtscript_gui.so
make[3]: Leaving directory `/home/matt/src/mscore-0.9.5/build'
[ 99%] Built target qtscript_gui
make[2]: Leaving directory `/home/matt/src/mscore-0.9.5/build'
make[1]: *** [all] Error 2
make[1]: Leaving directory `/home/matt/src/mscore-0.9.5/build'
make: *** [release] Error 2