qt compilation 2: electric boogaloo.

$ ./configure [dozens of options]
< building qmake, blah blah, success blah blah, run make && make install, blah blah >
$ make -j 8
< works for 5 minutes, then hits an error without telling me what the error is >
$ make -j 8
< works for 5 minutes until the same error. this time i notice it rm's a directory right before using it >
$ make # multithreaded fuckery, perhaps?
< fails after 5 seconds with different error >
$ make -j 2
< same >
$ make clean # fuck it, clean up and try again
< fails after 2 minutes of cleaning >

The C/C++ infrastructure. just everything about it. and i'm not even using dependencies here.