--- ./makefile.orig	2021-05-25 19:02:31.081243251 +0000
+++ ./makefile	2021-05-25 19:02:50.741677177 +0000
@@ -2,14 +2,13 @@
 # Makefile for UNIX - unrar
 
 # Linux using GCC
-CXX=c++
-CXXFLAGS=-O2 -Wno-logical-op-parentheses -Wno-switch -Wno-dangling-else
-LIBFLAGS=-fPIC
+CXX?=c++
+CXXFLAGS?=-O2 -Wno-logical-op-parentheses -Wno-switch -Wno-dangling-else
+LIBFLAGS=$(LDFLAGS)
 DEFINES=-D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE -DRAR_SMP
-STRIP=strip
-AR=ar
-LDFLAGS=-pthread
-DESTDIR=/usr
+STRIP?=strip
+AR?=ar
+LDFLAGS?=-pthread
 
 # Linux using LCC
 #CXX=lcc
@@ -161,14 +160,14 @@
 	$(AR) rcs libunrar.a $(OBJECTS) $(LIB_OBJ)
 
 install-unrar:
-			install -D unrar $(DESTDIR)/bin/unrar
+			install -D unrar $(DESTDIR)$(PREFIX)/bin/unrar
 
 uninstall-unrar:
 			rm -f $(DESTDIR)/bin/unrar
 
 install-lib:
-		install libunrar.so $(DESTDIR)/lib
-		install libunrar.a $(DESTDIR)/lib
+		install libunrar.so $(DESTDIR)$(PREFIX)/lib
+		install libunrar.a $(DESTDIR)$(PREFIX)/lib
 
 uninstall-lib:
 		rm -f $(DESTDIR)/lib/libunrar.so