diff -up ./startup/default-service.in.fix_uidgid ./startup/default-service.in
--- ./startup/default-service.in.fix_uidgid	2019-02-22 11:57:38.432525592 -0500
+++ ./startup/default-service.in	2019-02-22 11:58:03.823003073 -0500
@@ -5,6 +5,8 @@ After=network.target local-fs.target
 
 [Service]
 Type=forking
+User=nagios
+Group=nagios
 ExecStartPre=@bindir@/nagios -v @sysconfdir@/nagios.cfg
 ExecStart=@bindir@/nagios -d @sysconfdir@/nagios.cfg
 ExecStop=@BIN_KILL@ -s TERM ${MAINPID}