--- Makefile.orig	2013-07-11 14:07:53.000000000 -0400
+++ Makefile	2014-05-01 11:16:46.000000000 -0400
@@ -42,16 +42,16 @@
 	mkdir -p $(DESTDIR)$(PREFIX)/share/doc/monkeysphere
 	printf "Monkeysphere %s\n" $(MONKEYSPHERE_VERSION) > $(DESTDIR)$(PREFIX)/share/monkeysphere/VERSION
 	install src/monkeysphere $(DESTDIR)$(PREFIX)/bin
-	sed -i 's:__SYSSHAREDIR_PREFIX__:$(PREFIX):' $(DESTDIR)$(PREFIX)/bin/monkeysphere
+	sed -i'' -e  's:__SYSSHAREDIR_PREFIX__:$(PREFIX):' $(DESTDIR)$(PREFIX)/bin/monkeysphere
 	install src/monkeysphere-host $(DESTDIR)$(PREFIX)/sbin
-	sed -i 's:__SYSSHAREDIR_PREFIX__:$(PREFIX):' $(DESTDIR)$(PREFIX)/sbin/monkeysphere-host
+	sed -i'' -e  's:__SYSSHAREDIR_PREFIX__:$(PREFIX):' $(DESTDIR)$(PREFIX)/sbin/monkeysphere-host
 	install src/monkeysphere-authentication $(DESTDIR)$(PREFIX)/sbin
-	sed -i 's:__SYSSHAREDIR_PREFIX__:$(PREFIX):' $(DESTDIR)$(PREFIX)/sbin/monkeysphere-authentication
+	sed -i'' -e  's:__SYSSHAREDIR_PREFIX__:$(PREFIX):' $(DESTDIR)$(PREFIX)/sbin/monkeysphere-authentication
 	install src/monkeysphere-authentication-keys-for-user $(DESTDIR)$(PREFIX)/share/monkeysphere
 	install -m 0755 src/share/common $(DESTDIR)$(PREFIX)/share/monkeysphere
 	install -m 0644 src/share/defaultenv $(DESTDIR)$(PREFIX)/share/monkeysphere
-	sed -i 's:__SYSCONFDIR_PREFIX__:$(ETCPREFIX):' $(DESTDIR)$(PREFIX)/share/monkeysphere/defaultenv
-	sed -i 's:__SYSDATADIR_PREFIX__:$(LOCALSTATEDIR):' $(DESTDIR)$(PREFIX)/share/monkeysphere/defaultenv
+	sed -i'' -e  's:__SYSCONFDIR_PREFIX__:$(ETCPREFIX):' $(DESTDIR)$(PREFIX)/share/monkeysphere/defaultenv
+	sed -i'' -e  's:__SYSDATADIR_PREFIX__:$(LOCALSTATEDIR):' $(DESTDIR)$(PREFIX)/share/monkeysphere/defaultenv
 	install -m 0755 src/share/checkperms $(DESTDIR)$(PREFIX)/share/monkeysphere
 	install -m 0755 src/share/keytrans $(DESTDIR)$(PREFIX)/share/monkeysphere
 	ln -sf ../share/monkeysphere/keytrans $(DESTDIR)$(PREFIX)/bin/pem2openpgp
@@ -59,8 +59,8 @@
 	ln -sf ../share/monkeysphere/keytrans $(DESTDIR)$(PREFIX)/bin/openpgp2pem
 	ln -sf ../share/monkeysphere/keytrans $(DESTDIR)$(PREFIX)/bin/openpgp2spki
 	install -m 0744 src/transitions/* $(DESTDIR)$(PREFIX)/share/monkeysphere/transitions
-	sed -i 's:__SYSSHAREDIR_PREFIX__:$(PREFIX):' $(DESTDIR)$(PREFIX)/share/monkeysphere/transitions/0.23
-	sed -i 's:__SYSSHAREDIR_PREFIX__:$(PREFIX):' $(DESTDIR)$(PREFIX)/share/monkeysphere/transitions/0.28
+	sed -i'' -e  's:__SYSSHAREDIR_PREFIX__:$(PREFIX):' $(DESTDIR)$(PREFIX)/share/monkeysphere/transitions/0.23
+	sed -i'' -e  's:__SYSSHAREDIR_PREFIX__:$(PREFIX):' $(DESTDIR)$(PREFIX)/share/monkeysphere/transitions/0.28
 	install -m 0644 src/transitions/README.txt $(DESTDIR)$(PREFIX)/share/monkeysphere/transitions
 	install -m 0644 src/share/m/* $(DESTDIR)$(PREFIX)/share/monkeysphere/m
 	install -m 0644 src/share/mh/* $(DESTDIR)$(PREFIX)/share/monkeysphere/mh
@@ -82,15 +82,15 @@
 	ln -s openpgp2ssh.1.gz $(DESTDIR)$(MANPREFIX)/man1/openpgp2spki.1.gz
 	gzip -d man/*/*
 	gzip -d $(DESTDIR)$(MANPREFIX)/man1/monkeysphere.1.gz
-	sed -i 's:__SYSCONFDIR_PREFIX__:$(ETCPREFIX):' $(DESTDIR)$(MANPREFIX)/man1/monkeysphere.1
+	sed -i'' -e  's:__SYSCONFDIR_PREFIX__:$(ETCPREFIX):' $(DESTDIR)$(MANPREFIX)/man1/monkeysphere.1
 	gzip -n $(DESTDIR)$(MANPREFIX)/man1/monkeysphere.1
 	gzip -d $(DESTDIR)$(MANPREFIX)/man8/monkeysphere-host.8.gz
-	sed -i 's:__SYSCONFDIR_PREFIX__:$(ETCPREFIX):' $(DESTDIR)$(MANPREFIX)/man8/monkeysphere-host.8
-	sed -i 's:__SYSDATADIR_PREFIX__:$(LOCALSTATEDIR):' $(DESTDIR)$(MANPREFIX)/man8/monkeysphere-host.8
+	sed -i'' -e  's:__SYSCONFDIR_PREFIX__:$(ETCPREFIX):' $(DESTDIR)$(MANPREFIX)/man8/monkeysphere-host.8
+	sed -i'' -e  's:__SYSDATADIR_PREFIX__:$(LOCALSTATEDIR):' $(DESTDIR)$(MANPREFIX)/man8/monkeysphere-host.8
 	gzip -n $(DESTDIR)$(MANPREFIX)/man8/monkeysphere-host.8
 	gzip -d $(DESTDIR)$(MANPREFIX)/man8/monkeysphere-authentication.8.gz
-	sed -i 's:__SYSCONFDIR_PREFIX__:$(ETCPREFIX):' $(DESTDIR)$(MANPREFIX)/man8/monkeysphere-authentication.8
-	sed -i 's:__SYSDATADIR_PREFIX__:$(LOCALSTATEDIR):' $(DESTDIR)$(MANPREFIX)/man8/monkeysphere-authentication.8
+	sed -i'' -e  's:__SYSCONFDIR_PREFIX__:$(ETCPREFIX):' $(DESTDIR)$(MANPREFIX)/man8/monkeysphere-authentication.8
+	sed -i'' -e  's:__SYSDATADIR_PREFIX__:$(LOCALSTATEDIR):' $(DESTDIR)$(MANPREFIX)/man8/monkeysphere-authentication.8
 	gzip -n $(DESTDIR)$(MANPREFIX)/man8/monkeysphere-authentication.8
 
 # this target depends on you having the monkeysphere-docs