| Yeah, that's too old; and there's not been a release of a Cabal | which is new enough to do what you want. Wow! I'm doing the most basic thing: using Cabal to install a package with a specified GHC. I'll try what you suggest. Duncan: would a release be a good plan? Simon | | Try: | | git clone https://github.com/haskell/cabal | cd cabal/Cabal | cabal install | cd ../cabal-install | cabal install | | Edward | | Excerpts from Simon Peyton Jones's message of 2014-11-04 03:59:57 -0800: | > It says | > | > simonpj@cam-05-unx:~/tmp/singletons-1.0$ cabal --version | > cabal-install version 1.21.0.0 | > using version 1.21.0.0 of the Cabal library | > | > | > Oddly if I try "cabal update; cabal install cabal-install" it says: | > Resolving dependencies... | > Downloading Cabal-1.20.0.2... | > | > so it looks as if it's about to install an *older* version than the one | I have already! | > | > What now? | > | > Thanks | > | > SImon | > | > | -----Original Message----- | > | From: Herbert Valerio Riedel [mailto:hvriedel@gmail.com] | > | Sent: 04 November 2014 11:20 | > | To: Simon Peyton Jones | > | Cc: GHC Devs | > | Subject: Re: Can't install packages with my inplace compiler | > | | > | Hello Simon, | > | | > | On 2014-11-04 at 11:55:48 +0100, Simon Peyton Jones wrote: | > | > When I say | > | > | > | > cabal install | > | > --with-ghc=/home/simonpj/5builds/HEAD-2/inplace/bin/ghc-stage2 | > | > | > | > I get this | > | > | > | > ghc-stage2: ghc no longer supports single-file style package | > | databases | > | > (dist/package.conf.inplace) use 'ghc-pkg init' to create the | > | database | > | > with the correct format. | > | > | > | > Now, this is an old build tree, and I could blow it away entirely, | > | but | > | > maybe there is something else going on. What should I do? | > | | > | What does `cabal --version` say? If it doesn't say something like | > | | > | $ cabal --version | > | cabal-install version 1.21.1.0 | > | using version 1.21.1.0 of the Cabal library | > | | > | you probably need a newer one (in which case you should build the | > | `cabal` binary from Git, and to make life easier compile `Cabal` and | > | `cabal-install` with GHC 7.8.x rather than GHC HEAD) | > | | > | Cheers, | > | hvr