I try to upload a package to hackage and get the brief message
c-sources: C/libqhull_r.c' is not good relative path: same directory segment: ..
I cannot find (with google) any hint what is meant and what I should change (I am not the author of the code, but have permission of the author to upload to hackage).
The cabal file contains
include-dirs: C
C-sources: C/libqhull_r.c
, C/geom_r.c
, C/geom2_r.c
and builds with cabal build.