dhall-1.42.3: dhall-lang/tests/parser/success/unit/import/HeadersInteriorHashA.dhall
https://example.com/foo using (./headers sha256:0000000000000000000000000000000000000000000000000000000000000000)
https://example.com/foo using (./headers sha256:0000000000000000000000000000000000000000000000000000000000000000)