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I'm running 11.10 (amd64). I see there's this package:


$ sudo apt-get install haskell-hunit
Reading package lists... Done
Building dependency tree       
Reading state information... Done
E: Unable to locate package haskell-hunit

How should I resolve this?

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up vote 3 down vote accepted

That is a source package:

7.13 How do I install a source package?

Debian source packages can't actually be "installed", they are just unpacked in whatever directory you want to build the binary packages they produce.

Source packages are distributed on most of the same mirrors where you can obtain the binary packages. If you set up your APT's sources.list(5) to include the appropriate "deb-src" lines, you'll be able to easily download any source packages by running

 apt-get source foo

To help you in actually building the source package, Debian source package provide the so-called build-dependencies mechanism. This means that the source package maintainer keeps a list of other packages that are required to build their package. To see how this is useful, run

 apt-get build-dep foo

before building the source.

So you can't actually "install" it. However, there are binary packages built from it:

One of them should contain what you want.

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I typically install only Haskell Platform and GHC from apt and then install everything else through Cabal. Haskell dependencies are a bit messy and many times require updating packages much sooner than Ubuntu's 6 month release cycle. Cabal install's everything into ~/.cabal/ which is nice because if things get screwed up, you can delete it and start over. I think most of the Haskell community works this way from what I've gathered on IRC.

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