vm: Let ‘%immutable-store’ through.
Fixes guix/guix#1926.
‘guix system vm’ would so far produce a system without the
‘file-system-/gnu/store’ Shepherd service, which is normally provided by
‘%immutable-store’. This would lead to an error for OS configs that
explicitly require ‘file-system-/gnu/store’, such as those that use
‘qemu-binfmt-service-type’.
* gnu/system/vm.scm (virtualized-operating-system)[user-file-systems]: Remove
filtering of TARGET = (%store-prefix).
Reported-by: Ashvith Shetty <ashvithshetty0010@zohomail.in>
Change-Id: I656df6c3f067e47cd7acd03af437fe757db286d5