Compiling the project from sources is useful to… :
Hikou no mizu's dependencies are quite common and should be available on the repositories of most GNU/Linux and *BSD distributions :
For instance, on Debian & derivatives :
#apt-get install libsdl1.2debian libsdl1.2-dev libsdl-image1.2 libsdl-image1.2-dev libgl1-mesa-glx libgl1-mesa-dev libfreetype6 libfreetype6-dev libopenal1 libopenal-dev libvorbisfile3 libogg-dev libvorbis-dev
Since every dependencies were installed, hnm should now build properly :)
To build hnm, reach the src/ directory, containing a simple Makefile, and type make.
cd /hnm/directory/ cd src/ make
The compilation is quite short (currently (0.2dev) ~45 seconds on my old laptop ;)), and will generate an executable in src/ parent directory. So, to try the game :
cd ../ ./hikouNoMizu
And you're done !