I am stuck with ccminer compilation @linux (linux mint actually). Please help me.

- installed 340.24 driver from xedgers repo
- installed CUDA toolkit 6.0 from nvidia
- downloaded current ccminer source from github (once cbuchner1, once djm34)
- autoconfig.sh
- configure --with-cuda=/usr/local/cuda-6.0
- make -j8
- export LD_LIBRARY_PATH=/usr/local/cuda-6.0/lib64
- export PATH=$PATH:/usr/local/cuda-6.0/bin
- ccminer -a x11 -benchmark with or without exiting X

"Unable to query CUDA driver version! Is an nVidia driver installed?"
:-(

/dev/nvidia* exists

any ideas what I did wrong ?