```

curl --request PATCH 'https://api.cloudflare.com/client/v4/accounts/:account_id/pages/projects/:project_name' \
--header 'Authorization: Bearer <token>' \
--header 'Content-Type: application/json' \
--data-raw '{
    "deployment_configs": {
        "production": {
            "compatibility_flags": [
                "streams_enable_constructors"
            ]
        },
        "preview": {
            "compatibility_flags": [
                "streams_enable_constructors"
            ]
        }
    }
}'

curl --request PATCH 'https://api.cloudflare.com/client/v4/accounts/:account_id/pages/projects/:project_name' \
--header 'Authorization: Bearer <token>' \
--header 'Content-Type: application/json' \
--data-raw '{
    "deployment_configs": {
        "production": {
            "compatibility_flags": [
                "streams_enable_constructors"
            ]
        },
        "preview": {
            "compatibility_flags": [
                "streams_enable_constructors"
            ]
        }
    }
}'