diff '--color=auto' -ur keyfinder-cli-1.1.1.orig/Makefile keyfinder-cli-1.1.1/Makefile
--- keyfinder-cli-1.1.1.orig/Makefile	2019-04-14 14:45:40.000000000 +0200
+++ keyfinder-cli-1.1.1/Makefile	2025-03-12 22:03:07.343263338 +0100
@@ -1,7 +1,7 @@
 PREFIX=/usr/local
 
 keyfinder-cli: keyfinder_cli.cpp key_notations.h
-	$(CXX) $< -std=c++11 -Wall -lkeyfinder -lavcodec -lavformat -lavutil -lswresample -o $@
+	$(CXX) $(CPPFLAGS) $(CXXFLAGS) $(LDFLAGS) $< -std=c++11 -Wall -lkeyfinder -lavcodec -lavformat -lavutil -lswresample -o $@
 
 install: keyfinder-cli keyfinder-cli.1
 	install -d "${DESTDIR}${PREFIX}/bin"