NIFS is checked inside start_cgiinfo() already, this nicely aligns with the rest of the list in do_install().
Index: install.sub =================================================================== RCS file: /cvs/src/distrib/miniroot/install.sub,v retrieving revision 1.1015 diff -u -p -r1.1015 install.sub --- install.sub 21 Jun 2017 23:54:19 -0000 1.1015 +++ install.sub 24 Jun 2017 01:09:43 -0000 @@ -2704,9 +2704,8 @@ do_install() { # Configure the network. donetconfig - # If there's network connectivity, fetch list of mirror servers and - # installer choices from previous runs. - ((NIFS)) && start_cgiinfo + # Fetch list of mirror servers and installer choices from previous runs. + start_cgiinfo echo