Steps to reproduce

1. flutter/tools/gn --runtime-mode=debug --goma --unoptimized --no-lto --enable-impeller-vulkan
2. autoninja -C out/host_debug_unopt
3. cd out/host_debug_unopt
4. ./impeller_unittests

error

[ RUN      ] Play/RuntimeStageTest.CanRegisterStage/Vulkan
[FATAL:flutter/impeller/base/validation.cc(47)] Break on 'ImpellerValidationBreak' to inspect point of failure: Could not find the surface extension.
Abort trap: 6

background

I have moltenvk installed (locally) and I've tried arm64 and x86_64 builds but they didn't work. Brandon says it worked for him if he did a moltenvk global installation. Maybe we just need to make that a requirement.