Ozgur, Thanks for your reply. I have tried with at ghc command prompt: ghc>cabal update -v But the the message remains the same as before: Downloading the latest package list from hackage.haskell.org cabal: failed Is the any method to install manually? or if any. Regards, Deb --- On Mon, 20/9/10, Ozgur Akgun <ozgurakgun@gmail.com> wrote: From: Ozgur Akgun <ozgurakgun@gmail.com> Subject: Re: Fw: [Haskell-beginners] Installing package hsc3 – Haskell supercollider To: "Deb Midya" <debmidya@yahoo.com> Cc: beginners@haskell.org Received: Monday, 20 September, 2010, 10:48 AM On 20 September 2010 00:33, Deb Midya <debmidya@yahoo.com> wrote: At DOS prompt, I typed: \ghc> cabal update The following message appears: Downloading the latest package list from hackage.haskell.org cabal: failed Is there any solution for it please? To start with, you can run cabal update -v to get a more detailed output about the cause of the failure. Ozgur