[Nix-dev] Unable to install clang/llvm 3.9

[Layus]

3.9 was added to master two days ago[1]. You have to wait for it to 
reach the unstable channel and update, of install it from a checkout of 
nixpkgs.

[1] 
https://github.com/NixOS/nixpkgs/tree/master/pkgs/development/compilers/llvm

On 12/09/16 19:48, Wink Saville wrote:
> Thanks for the info, that helps, oh and I'm running NixOS which I
> installed using
> 16.03 on to a virtual private server and my configuration.nix file is
> here (https://goo.gl/cXjV8E) and here is my uname info:
>
> [wink at vps1:~]$ uname -a
> Linux vps1 4.4.20 #1-NixOS SMP Wed Sep 7 06:32:59 UTC 2016 x86_64 GNU/Linux
>
>
> It seems I don't have 3.9.0 available, how do I get it?
>
> [wink at vps1:~]$ nix-env -qaP llvm
> warning: name collision in input Nix expressions, skipping
> ‘/home/wink/.nix-defexpr/channels_root/nixos’
> nixos.llvm_34  llvm-3.4.2
> nixos.llvm_35  llvm-3.5.2
> nixos.llvm_36  llvm-3.6.2
> nixos.llvm     llvm-3.7.1
> nixos.llvm_38  llvm-3.8.0
>
> [wink at vps1:~]$ nix-env -qaP clang-wrapper
> warning: name collision in input Nix expressions, skipping
> ‘/home/wink/.nix-defexpr/channels_root/nixos’
> nixos.clangSelf  clang-wrapper-3.4.2
> nixos.clang_34   clang-wrapper-3.4.2
> nixos.clang_35   clang-wrapper-3.5.2
> nixos.clang_36   clang-wrapper-3.6.2
> nixos.clang      clang-wrapper-3.7.1
> nixos.clang_38   clang-wrapper-3.8.0
>
> (Btw, what have I done to cause the 'warning: name collision'?)
>
> On Mon, Sep 12, 2016 at 10:24 AM Layus <layus.on at gmail.com> wrote:
>> Hi,
>>
>> You can install llvm with nix-env -iA nixos.llvm nixos.clang (replace nixos by nixpkgs if you are not using NixOS).
>> If you want a specific version, you can install llvm_XX and clang_XX as in nix-env -iA nixos.llvm_34 nixos.clang_34.
>>
>> For your issue, it arises because you want to install “llvm” which exists in different versions.
>> Usually we provide a default one, but it seems currently broken in your channel.
>> The fix I provide installs the package by its attribute name (-A option), whis is, by construction, unique.
>>
>> nix-env is unable to pick the right llvm/clang amongst:
>>
>> $ nix-env -qaP llvm
>> nixos.llvm_34    llvm-3.4.2
>> nixos.llvm_35    llvm-3.5.2
>> nixos.llvm_36    llvm-3.6.2
>> nixos.llvm       llvm-3.7.1
>> nixos.llvm_38    llvm-3.8.0
>> $ nix-env -qaP clang-wrapper
>> nixos.clangSelf    clang-wrapper-3.4.2
>> nixos.clang_34     clang-wrapper-3.4.2
>> nixos.clang_35     clang-wrapper-3.5.2
>> nixos.clang_36     clang-wrapper-3.6.2
>> nixos.clang        clang-wrapper-3.7.1
>> nixos.clang_38     clang-wrapper-3.8.0
>>
>> — Layus.
>>
>> On 12/09/16 18:58, Wink Saville wrote:
>>
>> I'm unable to install clang/llvm 3.9.0:
>>
>> [wink at vps1:~]$ nix-env -qa llvm
>> warning: name collision in input Nix expressions, skipping
>> ‘/home/wink/.nix-defexpr/channels_root/nixos’
>> llvm-3.4.2
>> llvm-3.5.2
>> llvm-3.6.2
>> llvm-3.7.1
>> llvm-3.8.0
>>
>> [wink at vps1:~]$ nix-env -qa clang
>> warning: name collision in input Nix expressions, skipping
>> ‘/home/wink/.nix-defexpr/channels_root/nixos’
>> clang-3.7.1
>>
>>
>>
>> I'm currently on nixos-unstable-small:
>>
>> [wink at vps1:~]$ nix-channel --list
>> nixos https://nixos.org/channels/nixos-unstable-small
>>
>> What am I doing wrong?
>>
>> -- Wink
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