The NetBSD-current/i386 build is working again. The following commits were made between the last failed build and the successful build:
2021.01.26.15.08.02 martin src/etc/rc.d/Makefile,v 1.111 2021.01.26.15.29.41 skrll src/sys/dev/acpi/acpi_mcfg.c,v 1.22 2021.01.26.15.30.05 skrll src/sys/dev/acpi/acpi_mcfg.c,v 1.23 Logs can be found at: http://releng.NetBSD.org/b5reports/i386/commits-2021.01.html#2021.01.26.15.30.05