I think you are looking for the `--preserve-installed` flag.
# nix-env -iA nixpkgs.haskellPackages_ghc6104.ghc
# nix-env --preserve-installed -iA nixpkgs.haskellPackages_ghc762.ghc
in this case ghc is mapped to ghc-6.10.4 and `ghc-7.6.2` is of course
mapped to ghc-7.6.2.
Patrick
On Tue, Jun
Hi Nikita,
If you still have trouble talk about the target packages you want to
compile and which ghc versions you have to use. Then we can try to find
a solution.
In general:
- cabal works, but doesn't find C dependencies usually, which is why we
use nix
- ghc 6.10 is rather old now, which is
Hi Nikita,
> How does 'nix-env -i' determine which version of a package it should install?
if there are two packages that have the same name, then nix-env will
prefer the one that has the higher version number.
If several packages have the same name and version number, then the one
with the hig
Excerpts from Vladimír Čunát's message of Sat Jun 15 22:12:29 +0200 2013:
> Hmm, especially haskell packages are IMO better specified directly by
> attribute.
Not only those, See wiki "how to keep multiple packages up to date"
Again, hack-nix just solves it by allowing you to write a simple
conf
On 06/15/2013 10:06 PM, Nikita Karetnikov wrote:
Priorities can be assigned in the sources.
Could you show an example? It seems these files [1,2] don't have any.
[1]
https://github.com/NixOS/nixpkgs/blob/master/pkgs/development/libraries/haskell/binary/0.6.0.0.nix
[2]
https://github.com/Nix
> Priorities can be assigned in the sources.
Could you show an example? It seems these files [1,2] don't have any.
[1]
https://github.com/NixOS/nixpkgs/blob/master/pkgs/development/libraries/haskell/binary/0.6.0.0.nix
[2]
https://github.com/NixOS/nixpkgs/blob/master/pkgs/development/compilers/
On 06/15/2013 08:51 PM, Nikita Karetnikov wrote:
I have another question. How does 'nix-env -i' determine which version
of a package it should install?
Priorities can be assigned in the sources. Usually people do choose one
version as a reasonable default, and for libraries the other versions
> I have committed a patch recently that fix building of cabal-install
> with older GHC versions. Maybe that changes makes a difference. If you
> have the chance, please try installing that package again with a recent
> version of Nixpkgs.
It works, but I've tried too many things at the same time.
Hi Nikita,
> I've also tried 'nix-env -p ~/ghc-6.10.4 -i cabal-install-1.16.0.2', but
> 'binary' still fails with the same error:
>
> Warning: binary.cabal: This package requires Cabal version: >=1.8
I am not sure what is causing this error. The operation
nix-env -i cabal-install-1.16.0.2
> Could it be that /bin/sh is a symlink whose target is not in the
> chroot?
Yes. I used Guix to build a statically linked version of Bash:
guix# ./pre-inst-env guile
scheme@(guile-user)> (use-modules (guix packages)
(guix store)
Hi Nikita,
> Can I add the above to Nix Wiki?
yes, that would be great -- please feel free to update the Wiki!
> Maybe it's the right time to choose a license [1].
Yeah, we should really do that. And when I say "we", I really mean Eelco
should do that. :-)
Take care,
Peter
> The way to go is to create a separate profile for every version of GHC
> that you want to use like so:
> $ nix-env -p ~/ghc-6.10.4 -iA nixpkgs.haskellPackages_ghc6104.ghc
> $ nix-env -p ~/ghc-7.6.3 -iA nixpkgs.haskellPackages_ghc762.ghc
> Now, you can add both of those profiles into your c
Hi Nikita,
> According to [1], it should be possible to use multiple versions at once.
you are right, the wiki page is misleading. As others have pointed out
already, it is not possible to install multiple versions of GHC into the
same profile, because these packages collide in binaries like "bi
Excerpts from Vladimír Čunát's message of Wed Jun 12 10:25:39 +0200 2013:
> Installing multiple versions at once does *not* imply installing them
> into one profile. What would "ghc" command do??
Most ghcs have symlinks to their version, eg bin/ghc-7.6.1
So installing them into the same profile s
On 06/12/2013 01:19 AM, Nikita Karetnikov wrote:
I'm trying to install several versions of GHC. There are two
problems:
1. According to this page [1], it should be possible to use multiple
versions at once. But 'nix-env -iA' always replaces the previous
version. For example, if I run
Hi!
Nikita Karetnikov skribis:
> I'm trying to install several versions of GHC. There are two
> problems:
>
> 1. According to this page [1], it should be possible to use multiple
>versions at once. But 'nix-env -iA' always replaces the previous
>version. For example, if I run the foll
I'm trying to install several versions of GHC. There are two
problems:
1. According to this page [1], it should be possible to use multiple
versions at once. But 'nix-env -iA' always replaces the previous
version. For example, if I run the following commands:
# nix-env -iA nixpkgs.has
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