Don't use "with licenses;" for single licences

And don't use square brackets on such lines.

pkgs/development/tools/thrust/default.nix

@@ -40,7 +40,7 @@ in stdenv.mkDerivation rec {
   meta = with stdenv.lib; {
     description = "Chromium-based cross-platform / cross-language application framework";
     homepage = https://github.com/breach/thrust;
-    license = [ licenses.mit ];
+    license = licenses.mit;
     maintainers = [ maintainers.osener ];
     platforms = [ "x86_64-linux" ];
   };