This allows dagger.io/dagger/op.#Op to be maintained in regular uncommented CUE, but not participate by default in normal dagger evaluation (given the performance problems it currently introduces). The "full" #Op can be enabled by passing the "-t fullop" flag: cue eval -t fullop ./examples/react (which currently triggers the performance issue). Signed-off-by: Paul Jolly <paul@myitcv.io>