[Nix-dev] Nix User Guide comments

[Eelco Dolstra]

Hi Clemens,

On Mon, 20 Feb 2006 21:21:30 +0100
Clemens Tolboom <ctolboom at home.nl> wrote:

> Hi there,
> 
> i'm still stuck at chapter 5 but got (much?) wiser:
> 
> LittleWizard needs:
> - gtk >= 2.4
> - pkgconfig
> 
> nixpkgs-0.10pre4851 contains gtkLibs ... how to get gtk?

gtkLibs is actually an attribute set containing several packages ("gtk",
"glib", "atk" and "pango") - see e.g.
pkgs/development/libraries/gtk-libs-2.8/default.nix.  So what you
probably want in the expression for littlewizard is something like this:

  {stdenv, fetchurl, perl, gtk, ... (other dependencies like glib as
  appropriate) ...}:

  stdenv.mkDerivation {
    ...
    buildInputs = [perl gtk ...];
  }

and then call this expression in all-packages-generic.nix like this:

  littlewizard = import ../games/littlewizard {
    inherit fetchurl stdenv perl;
    inherit (gtkLibs) gtk ...;
  };

The syntax "inherit (gtkLibs) gtk" is equivalent to

  gtk = gtkLibs.gtk

by the way.

I hope this helps.

-- 
Eelco Dolstra | http://www.cs.uu.nl/~eelco