Google Cloud Build unable to fetch firebase for function deployment

I have the following very small cloudbuild.yaml file:

steps:
- name: 'gcr.io/myproject/firebase'
  args:
  - deploy
  - --only functions
  - --project=myproject

I also setup a cloud build trigger to run whenever I push a change to my repo. Builds trigger succesfully however, in the logs I see the following:

Pulling image: gcr.io/myproject/firebase Using default tag: latest
Error response from daemon: Head
“https://gcr.io/v2/myproject/firebase/manifests/latest”: name unknown:
Repository “gcr.io” not found

The build retries precisely 10 times and ends with the following error:

ERROR: failed to pull because we ran out of retries. ERROR ERROR:
build step 0 “gcr.io/myproject/firebase” failed: error pulling
build step 0 “gcr.io/myproject/firebase”: generic::unknown: retry
budget exhausted (10 attempts): step exited with non-zero status: 1

When I trigger the deployment locally with the following command it works fine :

firebase deploy --only functions

So I suspect I’m missing something with the yaml config and where the firebase functions are being fetched from.