prefix `ETCDIR` with `${PREFIX}/`
`ETCDIR` isn't prefixed and led to dangling files in `DESTDIR/etc`
@@ -39,7 +39,7 @@ BINDIR ?= ${PREFIX}/bin
LIBEXECDIR ?= ${PREFIX}/libexec
MANDIR ?= ${PREFIX}/share/man
SHAREDIR_CONTAINERS ?= ${PREFIX}/share/containers
-ETCDIR ?= /etc
+ETCDIR ?= ${PREFIX}/etc
TMPFILESDIR ?= ${PREFIX}/lib/tmpfiles.d
SYSTEMDDIR ?= ${PREFIX}/lib/systemd/system
USERSYSTEMDDIR ?= ${PREFIX}/lib/systemd/user
