Agreed, try make -j1 explicitly especially if you're using a script that sources build variables. Tobias/Paul, just want to confirm something:

Could we split the build to cater for threaded makes? Or are there other parts where > -j1 fails? As I know it from lmms 0.3, only the VST component needs -j1. This is part of what I used for 0.3 builds:

cd plugins/vst_base
make -j1
cd ../../

If it doesn't help reduce compilation time then I'll forget about it :)