File '~lib/@solo-io/proxy-runtime/proxy.ts' not found

[scaledapps]

Trying a sample assembly script. What's missing here?

prashantpatil~$npm list
wasm_ascript@ /Users/prashantpatil/istio/wasm_ascript
├── @solo-io/proxy-runtime@0.1.15
└── assemblyscript@0.21.6

prashantpatil~$npm install

up to date, audited 5 packages in 750ms

1 package is looking for funding
run npm fund for details

found 0 vulnerabilities
prashantpatil~$npm run asbuild:debug

asbuild:debug
asc assembly/index.ts --target debug

ERROR TS6054: File '~lib/@solo-io/proxy-runtime/proxy.ts' not found.
:
1 │ export * from "@solo-io/proxy-runtime/proxy"; // this exports the required functions for the proxy to interact with us.
│ ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
└─ in assembly/index.ts(1,15)

ERROR TS6054: File '~lib/@solo-io/proxy-runtime.ts' not found.
:
2 │ import { RootContext, Context, registerRootContext, FilterHeadersStatusValues, stream_context } from "@solo-io/proxy-runtime";
│ ~~~~~~~~~~~~~~~~~~~~~~~~
└─ in assembly/index.ts(2,102)

FAILURE 2 parse error(s)

[scaledapps]

@yuval-k : can you please help?