is a
.Ql $
then the value to be set is taken from the existing environment
-variable of the same name.
+variable of the indicated name.
.El
.It Ar identity
The username to match.
.Sh FILES
.Bl -tag -width "/etc/doas.conf"
.It Pa /etc/doas.conf
-Doas configuration file.
+doas configuration file.
.El
.Sh EXAMPLES
The following example permits user aja to install packages