--- Makefile.orig	2019-10-21 19:12:09 UTC
+++ Makefile
@@ -5,7 +5,7 @@ OBJECTS = tiv.o
 CXX      ?= g++
 CXXFLAGS ?= -O2 -fpermissive
 INSTALL  ?= install
-INSTALL_PROGRAM ?= $(INSTALL) -D
+INSTALL_PROGRAM ?= $(INSTALL)
 
 # https://www.gnu.org/prep/standards/html_node/Directory-Variables.html#Directory-Variables
 prefix      ?= /usr/local