Vue 2.7.16 + pinia 2.0.35 + typescript transpile error wrt vue-demi: no exported member named 'ToRef'

[fluffynuts]

I'm in the process of upgrading a vue2 project to all the latest stuff, and have identified the replacement of vuex with pinia as an atomic step I could do in preparation, whilst maintaining all the other parts of the system.

As per the title, I have installed:

• vue: 2.7.16
• pinia: 2.0.35
• vue-demi (brought in by pinia): 0.14.10 (and I've installed it at the root level too because @vuelidate libraries on latest are bringing in 0.13.11)

running tsc --noEmit via nodemon as I work through the store, I see the error:

node_modules/@vuelidate/core/index.d.ts:1:43 - error TS2724: '"vue-demi"' has no exported member named 'ComponentInternalInstance'. Did you mean 'ComponentInstance'?

1 import { Ref, UnwrapRef, defineComponent, ComponentInternalInstance } from 'vue-demi';
                                            ~~~~~~~~~~~~~~~~~~~~~~~~~

node_modules/pinia/dist/pinia.d.ts:7:10 - error TS2724: '"vue-demi"' has no exported member named 'ToRef'. Did you mean 'toRef'?

7 import { ToRef } from 'vue-demi';

Is there a "magic" / "correct" combination of packages that will result in an acceptable vue-demi import? Is there some other way to work around this? Any assistance appreciated: my google-fu has let me down.