Hi, > I suppose there is another package containing zlib.h that needs to be > installed, but how to identify it? Being only a casual booter of Debian, i use queries like this on my test machine (squeeze 6.0.2): $ apt-file search zlib.h ...awful.lots.of.matches... zlib1g-dev: /usr/include/zlib.h $ The last match is the one that looks right. So this should help: # apt-get install zlib1g-dev Have a nice day :) Thomas