Yeah, that's too old; and there's not been a release of a Cabal which is new enough to do what you want. 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