diff -rupN qcad-3.15.6.1/src/3rdparty/3rdparty.pro qcad-3.15.6.1-new/src/3rdparty/3rdparty.pro
--- qcad-3.15.6.1/src/3rdparty/3rdparty.pro	2016-12-01 10:40:01.000000000 +0100
+++ qcad-3.15.6.1-new/src/3rdparty/3rdparty.pro	2016-12-18 21:08:23.664591423 +0100
@@ -1,9 +1,6 @@
 include (../../shared.pri)
 TEMPLATE = subdirs
-SUBDIRS = \
-    spatialindexnavel \
-    stemmer \
-    quazip
+SUBDIRS = stemmer spatialindexnavel
 
 !r_no_opennurbs {
     SUBDIRS += opennurbs
diff -rupN qcad-3.15.6.1/src/spatialindex/RSpatialIndexNavel.h qcad-3.15.6.1-new/src/spatialindex/RSpatialIndexNavel.h
--- qcad-3.15.6.1/src/spatialindex/RSpatialIndexNavel.h	2016-12-01 10:40:01.000000000 +0100
+++ qcad-3.15.6.1-new/src/spatialindex/RSpatialIndexNavel.h	2016-12-18 21:04:31.387312658 +0100
@@ -28,7 +28,7 @@
 
 #include "RSpatialIndex.h"
 
-#include "spatialindexnavel/include/spatialindex/SpatialIndex.h"
+#include "spatialindex/SpatialIndex.h"
 
 class RSiDataStream : public SpatialIndex::IDataStream
 {
diff -rupN qcad-3.15.6.1/src/zip/RZip.cpp qcad-3.15.6.1-new/src/zip/RZip.cpp
--- qcad-3.15.6.1/src/zip/RZip.cpp	2016-12-01 10:40:01.000000000 +0100
+++ qcad-3.15.6.1-new/src/zip/RZip.cpp	2016-12-18 21:10:55.608091637 +0100
@@ -19,7 +19,7 @@
 //#include <QTextStream>
 //#include <QResource>
 
-#include "JlCompress.h"
+#include <quazip/JlCompress.h>
 
 #include "RZip.h"