diff --git a/src/Makevars.win b/src/Makevars.win
index e7ba533..ba7789b 100644
--- a/src/Makevars.win
+++ b/src/Makevars.win
@@ -12,3 +12,5 @@ clean:
 
 winlibs:
 	"${R_HOME}/bin${R_ARCH_BIN}/Rscript.exe" "../tools/winlibs.R"
+
+.PHONY: all winlibs clean