diff --git a/pkgs/development/libraries/gtk+/3.x.nix b/pkgs/development/libraries/gtk+/3.x.nix
index 5fb70ac05ea..a7f4bdad48a 100644
--- a/pkgs/development/libraries/gtk+/3.x.nix
+++ b/pkgs/development/libraries/gtk+/3.x.nix
@@ -10,7 +10,7 @@ assert cupsSupport -> cups != null;
 
 let
   ver_maj = "3.16";
-  ver_min = "6";
+  ver_min = "7";
   version = "${ver_maj}.${ver_min}";
 in
 stdenv.mkDerivation rec {
@@ -18,7 +18,7 @@ stdenv.mkDerivation rec {
 
   src = fetchurl {
     url = "mirror://gnome/sources/gtk+/${ver_maj}/gtk+-${version}.tar.xz";
-    sha256 = "1gpzlnfrifc17yfk0zki6b2vmsfpf5cmrbh232s6iaan11np44jd";
+    sha256 = "1fkzdhqa1pjzb1qsh2ll3y2567ylyszks59qspx85lalvqa9ss0r";
   };
 
   nativeBuildInputs = [ pkgconfig gettext gobjectIntrospection perl ];
@@ -30,13 +30,13 @@ stdenv.mkDerivation rec {
     ++ optional xineramaSupport libXinerama
     ++ optional cupsSupport cups;
 
-  NIX_LDFLAGS = if stdenv.isDarwin then "-lintl" else null;
-
   # demos fail to install, no idea where's the problem
   preConfigure = "sed '/^SRC_SUBDIRS /s/demos//' -i Makefile.in";
 
   enableParallelBuilding = true;
 
+  NIX_LDFLAGS = stdenv.lib.optionalString stdenv.isDarwin "-lintl";
+
   postInstall = "rm -rf $out/share/gtk-doc";
 
   passthru = {
@@ -46,7 +46,7 @@ stdenv.mkDerivation rec {
     ''; # workaround for bug of nix-mode for Emacs */ '';
   };
 
-  meta = {
+  meta = with stdenv.lib; {
     description = "A multi-platform toolkit for creating graphical user interfaces";
 
     longDescription = ''
@@ -62,9 +62,9 @@ stdenv.mkDerivation rec {
 
     homepage = http://www.gtk.org/;
 
-    license = stdenv.lib.licenses.lgpl2Plus;
+    license = licenses.lgpl2Plus;
 
-    maintainers = with stdenv.lib.maintainers; [ urkud raskin vcunat lethalman ];
-    platforms = stdenv.lib.platforms.all;
+    maintainers = with maintainers; [ urkud raskin vcunat lethalman ];
+    platforms = platforms.all;
   };
 }