Win64 regression build fails

[deviator]

gtk-d:gtkd 3.6.4: building configuration "library"...
..\..\AppData\Roaming\dub\packages\gtk-d-3.6.4\gtk-d\generated\gtkd\gtkc\glib.d(1754,52): Error: undefined identifier 'LIBRARY'
..\..\AppData\Roaming\dub\packages\gtk-d-3.6.4\gtk-d\generated\gtkd\gtkc\glib.d(1754,66): Error: undefined identifier 'LIBRARY'
..\..\AppData\Roaming\dub\packages\gtk-d-3.6.4\gtk-d\generated\gtkd\gtkc\glib.d(1755,52): Error: undefined identifier 'LIBRARY'
..\..\AppData\Roaming\dub\packages\gtk-d-3.6.4\gtk-d\generated\gtkd\gtkc\glib.d(1755,66): Error: undefined identifier 'LIBRARY'

fails on 3.6.3 too, on 3.6.2 all works

[MikeWey]

The 3.6 release has certainly become the release with the most regressions. Hopefully we don't break that record again :)