Hi, I now at least twice ran into the issue, that I forgot to add a module to the 'other-modules' section of the cabal file and uploaded a non buildable package to hackage. It would be nice if 'cabal sdist' or 'cabal upload' would warn the user about missing modules. I just tried 'cabal upload -c', but I'm getting: $ cabal upload -c dist/hsimport-0.2.6.2.tar.gz Checking dist/hsimport-0.2.6.2.tar.gz... Error: dist/hsimport-0.2.6.2.tar.gz: 404 Not Found Error: Page not found Sorry, it's just not here. $ cabal --version cabal-install version 1.18.0.2 using version 1.18.1 of the Cabal library It seems that currently the best way to guarantee a buildable package is to build the tarbar with 'cabal sdist' and then install this tarball with 'cabal install', right? Greetings, Daniel