fix buildkite build

[aG0aep6G]

Works for me locally. Let's see if Buildkite agrees.

[dlang-bot]

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Testing this PR locally

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[wilzbach]

Thanks! Any chance you could reduce the example from vibe.d to a test case?

[aG0aep6G]

Any chance you could reduce the example from vibe.d to a test case?

Not right now.

[aG0aep6G]

Any chance you could reduce the example from vibe.d to a test case?

Not right now.

There it is: https://issues.dlang.org/show_bug.cgi?id=19807