JACK dependency on Linux

Hey everybody,

Caused by troubles with ALSA on Ubuntu, i want to try out real-time esttings with JACK.

I disabled all audio-devices exept JACK in the Projucer and installed the latest library with sudo apt-get install ack-jackd2-dev
I even looked up in /usr/include/ for jack/jack.h and its existing.

But I still receive the error 'jack/jack.h' file not found in juce_audio_devices.cpp.

Is it necessary to include the /usr/include/ by manually?

Thanks for your ideas