## Volume group from which to allocate chroot volumes and snapshots.
CONFIG_VARS += VG LVPREFIX
-VG = vg-$(shell hostname)
+VG := vg-$(shell hostname)
LVPREFIX =
## Logical volume size, as an LVM option.
## Host's native architecture(s).
CONFIG_VARS += MYARCH NATIVE_ARCHS
-MYARCH = $(shell dpkg --print-architecture)
-OTHERARCHS = $(shell dpkg --print-foreign-architectures)
+MYARCH := $(shell dpkg --print-architecture)
+OTHERARCHS := $(shell dpkg --print-foreign-architectures)
NATIVE_ARCHS = $(MYARCH) $(OTHERARCHS)
## Foreign (emulated) architectures to support.