i get an error when trying to build an Haskell package which depends on a native C library, even though the header file seems to be at its place. The error says:
Missing (or bad) header file
If you increase build verbosity with say
-v3, you will get actual compiler error messages. In this case
/usr/include/zlib.h:34:19: fatal error: zconf.h: No such file or directory
A quick googling of the name
zlib.h reveals that this is a confirmed open Ubuntu bug.