i. e. (PR, howto test PR, upstream maintainer hint and code occurrences):
- https://github.com/nix-community/nixd/blob/dc0164e0df37e5d06bda61b6fb2ca16089d5f838/default.nix#L69
- https://github.com/NixOS/nixpkgs/pull/305285/files#diff-969ba1739d6853b40d4ebbf375e7a7811884d4aa2efdabbc516235118ab84d82R78
tl;dr replace meson test --print-errorlogs server regression/nix-ast-dump
by meson test --print-errorlogs unit/libnixf/Basic unit/libnixf/Parse unit/libnixt
in the PR state back then.