[Nix-dev] AgdaStdlib Doesn't install

[Taeer Bar-Yam]

Assumption I: Check. Putting in bad syntax to configuration.nix results in
an error from nixos-rebuil
Assumption II: I'm not sure exactly what you mean by "check under
test_profile"
The directory at `nix-build --no-out-link "<nixpkgs>" -A AgdaStdlib` has a
share/agda directory, which I think is what you're looking for.
Assumption III: I have succeeded in installing other packages. (e.g. emacs)
With this syntax. There is an emacs folder in /run/current-system/sw/share/
putting "42" in that same place does result in an error.
Assumption IV: I'm not sure how this works. Where is all-packages.nix? I
switched to the unstable branch with nix-channel, but that should be a
user-level change, right? Not system-level.
Assumption V: nixos-rebuild switch changes what I have installed. That
should rule out that problem, no?

Thanks for the help. Any other things that could be going wrong?

On Fri, Oct 2, 2015 at 11:41 PM, Bryan Gardiner <bog at khumba.net> wrote:

> On Fri, 2 Oct 2015 19:40:19 -0700
> James Cook <james.cook at utoronto.ca> wrote:
>
> > On 2 October 2015 at 13:12, Taeer Bar-Yam <tb442 at cornell.edu> wrote:
> > > I recently added pkgs.haskellPackages.Agda and pkgs.AgdaStdlib to my
> > > environment.systemPackages (in configuration.nix), and Agda still
> can't find
> > > the stdlib packages.
> > >
> > > I discussed this with someone on IRC for a while, and we discovered
> that I
> > > don't have an "agda" folder in /run/current-system/sw/share/ which I am
> > > supposed to have if pkgs.AgdaStdlib is in environment.systemPackages.
> > >
> > > Furthermore, when they put the same line in their configuration.nix,
> that
> > > folder did appear in their /run/current-system/sw/share/
> > >
> > > I'm sure this will come up, so I'll confirm now: I have `nixos-rebuild
> > > switch`ed to the new system.
> > >
> > > Does anyone have an idea of what's going on here? Is there any other
> > > diagnostic information that would be helpful?
> > >
> > >   --Taeer
> >
> > Hi Taeer,
> >
> > That's really strange. I think you will have to debug this on your
> > end. All I can think if is to examine every little step that makes us
> > think putting pkgs.AgdaStdlib in your configuration should make it
> > appear under /run/current-system/sw/share/. For example:
> >
> > - Assumption: nixos-rebuild is reading your configuration.nix. You
> > could test this by putting some bad syntax at the start of
> > configuration.nix and rebuilding.
> >
> > - Assumption: pkgs.AgdaStdlib produces a "share/agda" directory with
> > the version of nixpkgs you are using. You could try installing it with
> > nix-env -p test_profile -i -A pkgs.AgdaStdlib and checking under
> > test_profile
> >
> > - Assumption: Your syntax for specifying environment.systemPackages is
> > correct. Try putting other packages there and see if their files show
> > up under /run/current-system/sw/share/. Try putting something that's
> > not a package there (e.g. the number 42) and see if nixos-rebuild
> > complains (it should).
> >
> > - Assumption: nixos-rebuild is using the version of nixpkgs you think
> > it's using. You could test this by messing up your nixpkgs (e.g. by
> > adding bad syntax to all-packages.nix) and seeing if nixos-rebuild
> > complains.
>
> There's also the one that tripped me up:
>
> - Assumption: NixOS is mounting /boot properly, otherwise new system
>   generations won't take effect on boot but 'switch' will think
>   everything's applied.
>
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