Can't make use of any headers

[jallersma via D.gnu]

Perhaps I have a bit of a noob question, but how come I cannot 
use any of the GTKd headers on GCD? On DMD there's no header that 
works. I tried to use dub to install the GTKD libraries, but 
without any luck. Everytime I try to compile the libraries, I get:

$ dub
generated/gtkd/gtkd/Implement.d:24:8: error: module meta is in 
file 'std/meta.d' which cannot be read
  import std.meta;
         ^
import path[0] = /usr/lib/gcc/x86_64-linux-gnu/5/include/d
import path[1] = /home/name/Downloads/src
import path[2] = /home/name/Downloads/generated/gstreamer
import path[3] = /home/name/Downloads/generated/gtkd
import path[4] = /home/name/Downloads/generated/gtkdgl
import path[5] = /home/name/Downloads/generated/peas
import path[6] = /home/name/Downloads/generated/sourceview
import path[7] = /home/name/Downloads/generated/vte
gdc failed with exit code 1.



Using gtk in a random *.d file I get:

$ sudo gdc main.d -o main
main.d:1:8: error: module MainWindow is in file 
'gtk/MainWindow.d' which cannot be read
  import gtk.MainWindow, gtk.Box, gtk.Main;
         ^
import path[0] = /usr/lib/gcc/x86_64-linux-gnu/5/include/d