With new dub, at least builds work in this case, but they are considerably slower.

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Checking for missing dependencies.
Package supplier registry at https://code.dlang.org/ failed with 'HTTP request returned status code 0 ()', trying fallbacks.
Fallback registry at https://codemirror.dlang.org/ succeeded
Package supplier registry at https://code.dlang.org/ failed with 'HTTP request returned status code 0 ()', trying fallbacks.
Fallback registry at https://codemirror.dlang.org/ succeeded
Package supplier registry at https://code.dlang.org/ failed with 'HTTP request returned status code 0 ()', trying fallbacks.
Fallback registry at https://codemirror.dlang.org/ succeeded
Package supplier registry at https://code.dlang.org/ failed with 'HTTP request returned status code 0 ()', trying fallbacks.
Fallback registry at https://codemirror.dlang.org/ succeeded
Package supplier registry at https://code.dlang.org/ failed with 'HTTP request returned status code 0 ()', trying fallbacks.
Fallback registry at https://codemirror.dlang.org/ succeeded
Package supplier registry at https://code.dlang.org/ failed with 'HTTP request returned status code 0 ()', trying fallbacks.
Fallback registry at https://codemirror.dlang.org/ succeeded
Package supplier registry at https://code.dlang.org/ failed with 'HTTP request returned status code 0 ()', trying fallbacks.
Fallback registry at https://codemirror.dlang.org/ succeeded
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Package supplier registry at https://code.dlang.org/ failed with 'HTTP request returned status code 0 ()', trying fallbacks.
Fallback registry at https://codemirror.dlang.org/ succeeded