--- Makefile.am.orig	2019-07-23 16:38:02 UTC
+++ Makefile.am
@@ -23,7 +23,7 @@ SUBDIRS = src resource batch config desktop
 
 # special tasks to do if we're building the master server
 if BUILDMASTER
-masterInstallTasks=	cd  $(DESTDIR)$(bindir); mv armagetronad_main_master$(EXEEXT) @prognamebase@-master$(executable_suffix)
+masterInstallTasks=	cd  $(DESTDIR)$(bindir); mv -f armagetronad_main_master$(EXEEXT) @prognamebase@-master$(executable_suffix)
 masterUninstallTasks=rm -f $(DESTDIR)$(bindir)/@prognamebase@-master$(executable_suffix)
 else
 masterInstallTasks=echo 'No tasks for the master server'
@@ -107,7 +107,7 @@ endif
 install-exec-hook: install-uninstall
 #	rename executable to armagetronad-VERSION and link to armagetronad
 if BUILDMAIN
-	cd  $(DESTDIR)${bindir}; mv armagetronad_main$(EXEEXT) @progname@$(executable_suffix)
+	cd  $(DESTDIR)${bindir}; mv -f armagetronad_main$(EXEEXT) @progname@$(executable_suffix)
 endif
 
 #	delegate to special tasks