--- ladspa_sdk_1.15/src/Makefile.orig	2021-08-27 13:41:25.662036175 +0300
+++ ladspa_sdk_1.15/src/Makefile	2021-08-27 13:46:05.599826244 +0300
@@ -4,9 +4,10 @@
 #
 # Change these if you want to install somewhere else.
 
-INSTALL_PLUGINS_DIR	=	/usr/lib/ladspa/
-INSTALL_INCLUDE_DIR	=	/usr/include/
-INSTALL_BINARY_DIR	=	/usr/bin/
+PREFIX			=	/usr
+INSTALL_PLUGINS_DIR	=	$(PREFIX)/lib/ladspa/
+INSTALL_INCLUDE_DIR	=	$(PREFIX)/include/
+INSTALL_BINARY_DIR	=	$(PREFIX)/bin/
 
 ###############################################################################
 #
@@ -75,12 +76,12 @@
 	@echo Test complete.
 
 install:	targets
-	-mkdir -p $(INSTALL_PLUGINS_DIR)
-	-mkdir -p $(INSTALL_INCLUDE_DIR)
-	-mkdir -p $(INSTALL_BINARY_DIR)
-	cp ../plugins/* $(INSTALL_PLUGINS_DIR)
-	cp ladspa.h $(INSTALL_INCLUDE_DIR)
-	cp ../bin/* $(INSTALL_BINARY_DIR)
+	-mkdir -p $(DESTDIR)$(INSTALL_PLUGINS_DIR)
+	-mkdir -p $(DESTDIR)$(INSTALL_INCLUDE_DIR)
+	-mkdir -p $(DESTDIR)$(INSTALL_BINARY_DIR)
+	cp ../plugins/* $(DESTDIR)$(INSTALL_PLUGINS_DIR)
+	cp ladspa.h $(DESTDIR)$(INSTALL_INCLUDE_DIR)
+	cp ../bin/* $(DESTDIR)$(INSTALL_BINARY_DIR)
 
 /tmp/test.wav:	targets ../snd/noise.wav
 	../bin/listplugins