diff --git a/Makefile b/Makefile
index 4647efe..7e33b31 100644
--- a/Makefile
+++ b/Makefile
@@ -2,9 +2,9 @@
 
 OS = $(shell uname -s)
 ifeq ($(OS), Darwin)
-  PREFIX = /usr/local
+  PREFIX ?= /usr/local
 else
-  PREFIX = /usr
+  PREFIX ?= /usr
 endif
 MANPREFIX = $(PREFIX)/share/man
 
@@ -18,10 +18,7 @@ install:
 	for shared in share/*; do \
 		cp -f $$shared $(DESTDIR)$(PREFIX)/share/mutt-wizard; \
 	done
-	if [ "$(OS)" = "Darwin" ]; then \
-		sed -iba 's/\/usr\//\/usr\/local\//' $(DESTDIR)$(PREFIX)/share/mutt-wizard/mutt-wizard.muttrc; \
-		rm $(DESTDIR)$(PREFIX)/share/mutt-wizard/mutt-wizard.muttrcba; \
-	fi
+	sed -i 's,/usr,$(PREFIX),' $(DESTDIR)$(PREFIX)/share/mutt-wizard/mutt-wizard.muttrc;
 	mkdir -p $(DESTDIR)$(MANPREFIX)/man1
 	cp -f mw.1 $(DESTDIR)$(MANPREFIX)/man1/mw.1
 
@@ -30,5 +27,6 @@ uninstall:
 		rm -f $(DESTDIR)$(PREFIX)/$$script; \
 	done
 	rm -rf $(DESTDIR)$(PREFIX)/share/mutt-wizard
+	rm -rf $(DESTDIR)$(MANPREFIX)/man1/mw.1
 
 .PHONY: install uninstall
diff --git a/bin/mw b/bin/mw
index 461b382..385af66 100755
--- a/bin/mw
+++ b/bin/mw
@@ -1,14 +1,16 @@
 #!/bin/sh
 
-if [ -z "$prefix" ]; then
-  case "$(uname)" in
-    Linux) prefix="/usr" ;;
-    *)  prefix="/usr/local" ;;
-  esac
-fi
-
 VERSION="2.0"
 
+if [ "${BASH_SOURCE[0]}" = "${0}" ]; then
+  prefix=${0}
+else
+  prefix="$BASH_SOURCE"
+fi
+[ ! ${prefix::1} = "/" ] && prefix="$PWD/$prefix"
+prefix="${prefix%/bin/*}"
+mwbin="$prefix/bin/mw"
+
 _MW_="mutt-wizard"
 _MW_generated="mutt-wizard-generated"
 
@@ -428,7 +430,7 @@ _mwcron() {
     read -r mwcronminutes
     printf "\033[0m"
   done
-  (crontab -l; echo "*/$mwcronminutes * * * * export DBUS_SESSION_BUS_ADDRESS=unix:path=/run/user/$(id -u)/bus; export DISPLAY=:0; $(type mw | cut -d' ' -f3) sync") \
+  (crontab -l; echo "*/$mwcronminutes * * * * export DBUS_SESSION_BUS_ADDRESS=unix:path=/run/user/$(id -u)/bus; export DISPLAY=:0; $mwbin sync") \
       | crontab - && echo "mw cronjob added. Mail will sync every $mwcronminutes minutes. Be sure you have your cron manager running."
 }
 
@@ -645,7 +647,7 @@ _mwsyncandnotify() {
   else
     $mwmbsyncbin  $mwaddr
   fi
-  [ -z "$mwnono" ] && return
+  [ -n "$mwnono" ] && return
   mwlastrun="$mwaccmaildir/.mw.lastrun"
   mwnew=$(find "$mwaccmaildir/INBOX/new/" "$mwaccmaildir/Inbox/new/" "$mwaccmaildir/inbox/new/" -type f -newer "$mwlastrun" 2> /dev/null)
   newcount=$(echo "$mwnew" | sed '/^\s*$/d' | wc -l)
diff --git a/test/dotests b/test/dotests
index 2087252..6d96ebb 100755
--- a/test/dotests
+++ b/test/dotests
@@ -7,9 +7,7 @@ bats --tap test_mw.bats
 
 echo
 echo "Integration tests need working email $mwaddr"
-echo "CTRL-C to skip"
 
-#modify
 if [ -z "$MAILDIR" ] || [ -z "$mwaddr" ]; then
     echo "First do:"
     [ -z "$MAILDIR" ] && echo "export MAILDIR=..."
@@ -17,11 +15,15 @@ if [ -z "$MAILDIR" ] || [ -z "$mwaddr" ]; then
     exit
 fi
 
-cd .. && sudo make install && OK="OK"
+export PREFIX=$PWD/mwtesttmp
+export PATH=$PATH:$PREFIX/bin
+
+cd .. && make install && OK="OK"
 
 if [ "$OK" = "OK" ]; then
 
     echo "Warning: Out with CTRL-C if your mail (config) files are important here."
+    read
 
     export mwmaildir=$MAILDIR
     export mwname='r n'
@@ -34,6 +36,7 @@ if [ "$OK" = "OK" ]; then
     [ -f "${PASSWORD_STORE_DIR:-~/.password-store}/$mwpass.gpg" ] || pass insert $mwpass
 
     echo "= Test 1 ="
+    echo $PATH
     mwtype=online mw add
     echo "=> In another prompt, start mutt and verify that mails are shown"
     echo "=> Then answer with N"
@@ -53,3 +56,6 @@ if [ "$OK" = "OK" ]; then
 fi
 
 cd $CD
+
+rm -rf $PREFIX
+
diff --git a/test/test_mw.bats b/test/test_mw.bats
index f1c12a6..5d0ac8b 100644
--- a/test/test_mw.bats
+++ b/test/test_mw.bats
@@ -20,7 +20,6 @@ setup()
     XDG_CONFIG_HOME=mwtesttmp/config \
     MAILDIR=mwtesttmp/share/mail \
     XDG_CACHE_HOME=mwtesttmp/cache \
-    prefix="$PWD" \
     source ../bin/mw
     export NOTMUCH_CONFIG=mwtesttmp/config/notmuch-config
     export mwname="real name"