Do not rely on CUSKs in 'base'
With this patch, base
compiles even if CUSKs are disabled by default.
It is a part of !1602 that does not need to wait for GHC 8.14
With this patch, base
compiles even if CUSKs are disabled by default.
It is a part of !1602 that does not need to wait for GHC 8.14