Install DCD language server on Raspberrry PI4 (aarch64) requires rdmd , command not found.

[Alain De Vos]

I want to install the DCD language server on Raspberry PI4.
But the dub build for DCD requires rdmd which is not available.
Can I compile rdmd from source ? Or install a binary ?
[PS: I have ldc 1:1.24.0-2 installed ]