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--- a/src/mk/Linux
+++ b/src/mk/Linux
@@ -3,8 +3,6 @@
 include $(depth)/mk/localdefs
 
 ALL_CXXFLAGS = $(CXXFLAGS) $(COMMONCXXFLAGS) $(LOCALCXXFLAGS) \
-	 -D_GNU_SOURCE \
-	 -DHAVE_VASPRINTF=1 \
-	 -DHAVE_MKDTEMP=1
+	 -D_GNU_SOURCE 
 
 LIBSYS = -lpthread -ldl