When specifying the `builder` attribute in `stdenv.mkDerivation`, this
will be effectively transformed into
builtins.derivation {
builder = stdenv.shell;
args = [ "-e" builder ];
}
This also means that `default-builder.sh` is never sourced and as a
result it's not guaranteed that `$NIX_ATTRS_SH_FILE` is set to a correct
location[1].
Also, we need to source `.attrs.sh` to source `$stdenv`. So, the
following is done now:
* If `$NIX_ATTRS_SH_FILE` points to a correct location, then use it.
Directly using `.attrs.sh` is problematic for `nix-shell(1)` usage
(see previous commit for more context), so prefer the environment
variable if possible.
* Otherwise, if `.attrs.sh` exists, then use it. See [1] for when this
can happen.
* If neither applies, it can be assumed that `__structuredAttrs` is
turned off and thus nothing needs to be done.
[1] It's possible that it doesn't exist at all - in case of Nix 2.3 or
it can point to a wrong location on older Nix versions with a bug in
`__structuredAttrs`.
This seems to have been confusing people, using both xlibs and xorg, etc.
- Avoided renaming local (and different) xlibs binding in gcc*.
- Fixed cases where both xorg and xlibs were used.
Hopefully everything still works as before.
in /usr/lib/libGL.so.1 (which will typically load a driver in
/usr/X11R6/lib/modules/dri). This has been tested on a i915
graphics card; it should work with most open source X.org drivers.
For NVidia's proprietary drivers (which we cannot build ourselves
anyway), some more symlinks are necessary; I'll add those later.
So to get hardware-accelerated Quake 3, do:
$ nix-env -p /nix/var/nix/profiles/opengl -i xorg-sys-opengl
$ nix-env -i quake3-demo
$ quake3
svn path=/nixpkgs/trunk/; revision=4613
