Hi, Excuse me in advance if this is a trivial question, but I have been unable to find (understand?) the answer in Cabal's documentation. My issue is simple : I build a Cabal package named, let's say, "foo". That package is a library (libHSfoo.a, something like that), which exposes its Foo.Bar and Foobar modules. I wrote the cabal file, register it, everything seems fine. The issue comes when I try to use that package when compiling a main program, like this : ghc -package foo MyMain.hs [other options] I get an error about the compiler not finding the interface files Foobar.hi and Bar.hi, as I have "import Bar" and "import Foo.Bar" in my "MyMain.hs" file. Of course, I could add "-l" flags to point to the ".hi" files that I used to compile my package, but I get the well-known issue about the fact that the package's names of the interface files (which were compiled with the "-package-name foo" option) are not the correct ones ("Bad interface file: ../foo/Foobar.hi, Something is amiss; requested module main:Foobar differs from name found in the interface file foo:Foobar") ; and that solution is ugly anyway. So far, I found some Cabal documentation talking about the import-dirs property, but I did not manage to "make it work", I mean, my package does not seems to "include" the interface files. I am sure, on the other hand, that it is possible :) Sincerely yours, Fernand