Merge commit staging+systemd into closure-size

Many non-conflict problems weren't (fully) resolved in this commit yet.

pkgs/development/libraries/libjpeg-turbo/default.nix

@@ -1,11 +1,11 @@
 { stdenv, fetchurl, nasm, autoreconfHook }:
 
 stdenv.mkDerivation rec {
-  name = "libjpeg-turbo-1.4.0";
+  name = "libjpeg-turbo-1.4.2";
 
   src = fetchurl {
     url = "mirror://sourceforge/libjpeg-turbo/${name}.tar.gz";
-    sha256 = "1vmv5ciqq98gi2ishqbvlx9hsk7sl06lr6xkcgw480jiddadhfnr";
+    sha256 = "0gi349hp1x7mb98s4mf66sb2xay2kjjxj9ihrriw0yiy0k9va6sj";
   };
 
   outputs = [ "dev" "out" "doc" "bin" ];
@@ -21,8 +21,10 @@ stdenv.mkDerivation rec {
     homepage = http://libjpeg-turbo.virtualgl.org/;
     description = "A faster (using SIMD) libjpeg implementation";
     license = licenses.ijg; # and some parts under other BSD-style licenses
-    platforms = platforms.all;
     maintainers = [ maintainers.vcunat ];
+    # upstream supports darwin (and others), but it doesn't build currently
+    platforms = platforms.all;
+    hydraPlatforms = platforms.linux;
   };
 }