| my best guess: your proxy settings seem off I think that's a good guess. On this machine we used to have to use a proxy (so $http_proxy had a URL in it), but now we don't (so $http_proxy is empty). Maybe that's confusing Cabal. On a machine that doesn't need to use a proxy server, what should $http_proxy be set to? Simon | -----Original Message----- | From: Herbert Valerio Riedel [mailto:hvriedel@gmail.com] | Sent: 08 May 2014 13:41 | To: Simon Peyton Jones | Cc: ghc-devs@haskell.org; Simon Marlow | Subject: Re: Cabal can't open a TCP connection | | 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