diff -Nrup a/Makefile b/Makefile

--- a/Makefile	2020-02-05 08:40:29.000000000 +0100

+++ b/Makefile	2020-02-06 16:16:37.267011142 +0100

@@ -8,7 +8,7 @@

 PROGRAM=eureka

 # prefix choices: /usr  /usr/local  /opt

-PREFIX ?= /usr/local

+PREFIX ?= /usr

 # CXX=clang++-6.0

@@ -151,7 +151,7 @@ stripped: all

 INSTALL_DIR=$(DESTDIR)$(PREFIX)/share/eureka

 install: all

-	install -m 755 $(PROGRAM) $(DESTDIR)$(PREFIX)/bin/

+	install -D -m 755 $(PROGRAM) $(DESTDIR)$(PREFIX)/bin/$(PROGRAM)

 	install -d $(INSTALL_DIR)/games

 	install -d $(INSTALL_DIR)/common

 	install -d $(INSTALL_DIR)/ports

@@ -163,6 +163,9 @@ install: all

 	install -m 644 games/*.* $(INSTALL_DIR)/games

 	install -m 644 common/*.* $(INSTALL_DIR)/common

 	install -m 644 ports/*.* $(INSTALL_DIR)/ports

+	install -D -m 644 misc/eureka.desktop $(DESTDIR)$(PREFIX)/share/applications/eureka.desktop

+	install -D -m 644 misc/eureka.xpm $(DESTDIR)$(PREFIX)/share/pixmaps/eureka.xpm

+	install -D -m 644 misc/eureka.6 $(DESTDIR)$(PREFIX)/share/man/man6/eureka.6

 full-install: install

 	xdg-desktop-menu  install --novendor misc/eureka.desktop