Hi, In my project I am using C include/header files that are hierarchically nested into folders. These header files are used to compile the Haskell package and everything is fine with the compilation process. I want these include files also to be installed with the package. From the online documentation of Cabal I learned that there exists specific field for this purpose called install-includes. However, it does not work when include files are hierarchically nested into folders. Here is relevant part of the cabal file I am using. include-dirs: cbits/sundials/include install-includes: nvector/nvector_serial.h when I am issuing cabal install command I am getting the following error: cabal: Error: some packages failed to install: Hydra-0.1 failed during the final install step. The exception was: /home/ggg/.cabal/lib/Hydra-0.1/ghc-6.10.1/include/nvector: copyFile: does not exist (No such file or directory) It seems to me that cabal forgets to create parent directories for folder nested include files. For not-nested include files install-includes filed works fine. The Cabal version I am using is 1.6.0.1. The cabal-install version I am using is 0.6.0 Currently, as a workaround I am using data-files field to install include files. However, I would like to see this issue fixed (I assume it is a bug). Cheers, George -- George Giorgidze http://www.cs.nott.ac.uk/~ggg/