diff -up VTK-8.2.0/ThirdParty/libproj/vtk_libproj.h.in.proj6 VTK-8.2.0/ThirdParty/libproj/vtk_libproj.h.in
--- VTK-8.2.0/ThirdParty/libproj/vtk_libproj.h.in.proj6	2019-01-30 10:15:13.000000000 -0700
+++ VTK-8.2.0/ThirdParty/libproj/vtk_libproj.h.in	2019-09-08 20:17:31.848988325 -0600
@@ -18,7 +18,7 @@
 /* Use the libproj library configured for VTK.  */
 #cmakedefine VTK_USE_SYSTEM_LIBPROJ
 #ifdef VTK_USE_SYSTEM_LIBPROJ
-# include <projects.h>
+# define ACCEPT_USE_OF_DEPRECATED_PROJ_API_H
 # include <proj_api.h>
 # include <geodesic.h>
 #else