--- a
+++ b/src/Makevars.win
@@ -0,0 +1,21 @@
+RWINLIB = ../windows/opencv
+PKG_CPPFLAGS = -I$(RWINLIB)/include/opencv4 -DHAVE_XFEATURES2D
+OLDLIBDIR = lib${subst gcc,,${COMPILED_BY}}${R_ARCH}
+
+PKG_LIBS = \
+	-L$(RWINLIB)/$(OLDLIBDIR) \
+	-L$(RWINLIB)/lib \
+	-lopencv_ml481 -lopencv_objdetect481 -lopencv_photo481 -lopencv_stitching481 -lopencv_shape481 -lopencv_wechat_qrcode481 -lopencv_dnn481 \
+	-lopencv_video481 -lopencv_calib3d481 -lopencv_xfeatures2d481 -lopencv_features2d481 -lopencv_highgui481 -lopencv_flann481 \
+	-lopencv_videoio481 -lopencv_imgcodecs481 -lopencv_imgproc481 -lopencv_core481 -llibopenjp2 -lquirc \
+	-ljpeg -lwebp -lsharpyuv -lpng -lz -ltiff -lpthread -lgdi32 -lole32 -lopengl32 -lcomdlg32 -lOleAut32 -luuid
+
+all: clean winlibs
+
+clean:
+	rm -f $(SHLIB) $(OBJECTS)
+
+winlibs:
+	"${R_HOME}/bin${R_ARCH_BIN}/Rscript.exe" "../tools/winlibs.R" ${VERSION}
+	mkdir -p ../inst
+	cp -r $(RWINLIB)/share ../inst/
\ No newline at end of file