Cabal Update and Package Installation Errors

Question

When I do cabal install criterion

I get the following error regarding the package vector-algorithms

Warning: The package list for 'hackage.haskell.org' is 16 days old.
Run 'cabal update' to get the latest list of available packages.
Resolving dependencies...
Downloading vector-algorithms-0.4...
cabal: Error: some packages failed to install:
vector-algorithms-0.4 failed while downloading the package. The exception was:
connect: does not exist (Connection refused)

And when I run cabal update it again errors with

Downloading the latest package list from hackage.haskell.org
cabal: openTCPConnection: host lookup failure for ""

What is wrong?

I'm using Ubuntu 11.10 and GHC 7.0.4 from this PPA and my network connection is just fine in the rest of the system.

Answer 1

It was a proxy setting. It didn't suffice to unset ftp_proxy or http_proxy but also https_proxy. GNOME doesn't automatically remove terminal proxy configuraition when I disable it from system settings. Very annoying. I will write a shell-script that disables all proxy settings.

Sorry for bothering you all.