TypeScript Project References

Has anyone been able to get project references working with an ionic project, we have an existing vue 2 web mono repo working fine with ts project refs. Using the same methodology and similar configuration we get TS6305 Output file "X.d.ts" has not been built from source file "X.ts"

npx ionic serve doesn’t seem to be triggering --build for tsc which will correctly build the sub projects.

Anyone got this working in a mono-repo setup?