On 2014-05-08 at 14:03:22 +0200, Simon Peyton Jones wrote: > Dear ghc-devs > Cabal can't open a TCP connection from my Linux box. It used to work fine. Here's what it says: [...] > proxy uri host: , port: > Creating new connection to > cabal: openTCPConnection: host lookup failure for "" my best guess: your proxy settings seem off