Is it posible to use a variable as a part of context name in extensions.conf?

I tried to use under global variable what I will call as part of the name of context, but asterisk fail to load that rule.

[globals]
PREFIX_1=066
....
....
[dongle-incoming-sms-${PREFIX_1}]
...
...
same => n,Hangup()

[${PREFIX_1}-incoming_CALL]
...
...
same => n,Hangup()

include => dongle-incoming-sms-${PREFIX_1}

If I reload dialplan I got the error:

[Sep 24 14:26:36] WARNING[4772]: pbx.c:8547 ast_context_verify_includes: Context '${PREFIX_1}-incoming_CALL' tries to include nonexistent context 'dongle-incoming-sms-066'

Is it imposible or simply the way of calling the variable is not same as when I call inside of context?
Thx

No, I do not believe the context name is evaluated for substitution.

Thx for quick replay…
Lets wait for other opinion.

Variable substitution is normally done when the dialplan is executed, between when priority is fetched and when the application is called… At this point the context names have already been interpreted in order to placed the priorities in an internal data structure allowing which access.

Ok understand…so imposible.