Hi, HAIKU i have a problem! The situaation are: Install a C++ lib (https://github.com/maekitalo/cxxtools) In the past: ,/configute --prefix=/boot/common -> this works, but noew Haiku have a packaged system, and the "common" folder are deprecated install path. I read, the "/boot/system/non-packaged" are the right place to install. The problem are the "include" path are not working anymore, because haiku will need PREFIX/develop/headers The lib, are a autotool project, when i add the --includedir=/boot/system/nin-packaged became i error (make install) he can't mkdir -p 655 'develop/header' When i not can set the includedir than can't used this lib, he can't found the header. (haiku look inti develop/headers not /include) What can i do now? Thanks Ralf