S2I Build is unable to pull or push to the internal OpenShift Registry

Issue

When running a Build in OpenShift, the build Pod is unable to pull and/or push images to/from the internal OpenShift Registry.

The BuildConfig includes an environment variable override similar to the following:

        sourceStrategy:
...
          env:
            - name: NO_PROXY
              value: artifactory.XXX.XXX.XX

An error similar to the following errors is displayed in the Builder Pod:

Example 1

error: build error: Failed to push image: trying to reuse blob sha256:XXXXXXXXXXXXXXXXXXXXXXXXXXXXXX at destination: pinging container registry image-registry.openshift-image-registry.svc:5000: invalid status code from registry 403 (Forbidden)

Example 2

    Warning: Pull failed, retrying in 5s ...

    Trying to pull
    image-registry.openshift-image-registry.svc:5000/openshift/XXXXXX...
...

    error: build error: After retrying 2 times, Pull image sti...svc:5000:
    invalid status code from registry 403 (Forbidden)