"platforms.gnu" has been linux-only since at least 17.03:
$ nix eval -f channel:nixos-17.03 lib.platforms.gnu
[ "i686-linux" "x86_64-linux" "armv5tel-linux" "armv6l-linux" "armv7l-linux" "aarch64-linux" "mips64el-linux" ]
Unlike platforms.linux, platforms.gnu indicates "must use glibc"
which for the most part is not intended.
Replacing platforms.gnu with platforms.linux would be the same "today"
but let's err on preserving existing behavior and be optimistic
about platforms these packages work on.
Error is:
ERROR: In procedure %resolve-variable:
ERROR: Unbound variable: use-syntax
FAIL: sxml.ssax.scm
Also add pkg-config so that configure script can find libguile.
Relevant to #28643
Some of these should be longDescriptions, but most others just
shouldn't contain newlines. E.g. write
description = "Bla";
and not
description = ''
Bla
'';
This pollutes "nix-env -qa --description" output.
svn path=/nixpkgs/trunk/; revision=14310