Can't install packages with my inplace compiler

[Simon Peyton Jones]

| 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 at 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 at 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