gtk2-x11 ignores system-wide configuration

[ChengCat]

Issue description

As indicated by a strace, gtk2-x11 doesn't look in /etc/gtk-2.0/gtkrc for a system-wide configuration, but look in ${pkgs.gtk2-x11}/etc/gtk-2.0/gtkrc instead.

I expect the system-wide configuration file /etc/gtk-2.0/gtkrc to work. GTK+ 2 should accept <SYSCONFDIR>/gtk-2.0/gtkrc as described in https://developer.gnome.org/gtk2/stable/gtk2-Resource-Files.html, and I expect <SYSCONFDIR> to be /etc.

Technical details

• system: "x86_64-linux"
• host os: Linux 4.9.60, NixOS, 17.09.1997.1a8a95e879 (Hummingbird)
• multi-user?: yes
• sandbox: yes
• version: nix-env (Nix) 1.11.15
• channels(cheng): ""
• nixpkgs: /nix/var/nix/profiles/per-user/root/channels/nixos/nixpkgs

[stale]

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[Artturin]

#221019 should fix this