[Nix-dev] Override php xslSupport config option

[4levels]

Hi all,

I tried the other way as mentioned in the Wiki as follows:

    nixpkgs.config.packageOverrides = pkgs: rec {
      php56 = pkgs.stdenv.lib.overrideDerivation pkgs.php56 (oldAttrs: {
        cfg.xslSupport = true;
      });
    };

But this results in *error: cannot coerce a set to a string* in the php
default.nix file on line 18, which is the line where the version is
specified.  I'm clearly missing something obvious here (again) so still no
luck.

Thanks for your support!

Erik

On Tue, Nov 1, 2016 at 2:35 PM 4levels <4levels at gmail.com> wrote:

> Hi all,
>
> I've managed to at least fix the build errors by adding the following
> (after reading the Wiki on package overrides here
> https://nixos.org/wiki/Nix_Modifying_Packages#Overriding_Existing_Packages
>
> So the nixops deploy command succeeds, but unfortunately still no xsl
> support in PHP
>
> I currently have the following:
>
>     nixpkgs.config.packageOverrides = pkgs: rec {
>       php56 = pkgs.php56.override {
>         config = {
>           xslSupport = true;
>         };
>       };
>     };
>
>
>
> On Tue, Nov 1, 2016 at 2:21 PM 4levels <4levels at gmail.com> wrote:
>
> Hi Devs,
>
> thanks for the info!
> However I'm struggling to get this in my NixOps config, my expression
> keeps failing as I'm probably doing it all wrong since I have no experience
> with packageOverrides.
>
> Can you provide an example (or link to one) where I can see this mechanism
> work?
>
> This is what I currently have (excerpt):
>
>     environment.systemPackages = with pkgs; [
>       wget
>       unzip
>       gitMinimal
>       tmux
>       mariadb
>       php56
>       duplicity
>       nodejs
>       redis
>       php56Packages.apcu
>       php56Packages.composer
>       php56Packages.redis
>       certbot
>       sysstat
>       iotop
>     ];
>
>     nixpkgs.config.packageOverrides = php56:
>       php56.merge {
>         cfg = {
>           xslSupport = true;
>         };
>       };
>     }
>
>
> On Sun, Oct 30, 2016 at 8:06 PM Jookia <166291 at gmail.com> wrote:
>
> On Sun, Oct 30, 2016 at 09:59:20PM +0300, Игорь Пашев wrote:
> > Something like this:
> >
> > { php70 }: php70.merge {
> >   cfg = {
> >     apxs2Support = false;
> >     ldapSupport = false;
> >     mssqlSupport = false;
> >     pdo_pgsqlSupport = false;
> >     postgresqlSupport = false;
> >     sqliteSupport = false;
> >     xslSupport = false;
> >   };
> > }
> >
> > Use this with nixpkgs.config.packageOverrides
>
> It's really obscure how to use these old-timey .merge{} operations. Maybe
> it
> should be documented somewhere or finally replaced with proper overrides?
>
>
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