Doxygen is built with different flags than the usual release #2986

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1. andu-nordic

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   bugSomething isn't workingSomething isn't working

   triageIssue needs triageIssue needs triage

   packageRequest to add a package or report a problemRequest to add a package or report a problem

   on Sep 25, 2026
2. mikeland73

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   unrelated

   p4

   on Sep 28, 2026
3. mikeland73 commented on Sep 28, 2026

   

   mikeland73

   on Sep 28, 2026 – with Claude

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   Triage: unrelated, p4

   This is how nixpkgs packages doxygen, not something Devbox or Nixhub does. Nixhub only indexes what nixpkgs builds. The current nixpkgs pkgs/by-name/do/doxygen/package.nix (version 1.17.0) sets only:

   cmakeFlags = [ "-Duse_sys_spdlog=ON" "-Duse_sys_fmt=ON" "-Duse_sys_sqlite3=ON" ] ++ lib.optional withGui "-Dbuild_wizard=YES";

   It has no use_libclang option and no libclang/llvm build input, so every doxygen version in nixpkgs, and therefore on Nixhub, is built without clang support.

   Options:

   • Upstream (nixpkgs): open an issue or PR to add something like a withLibclang ? false argument that adds llvmPackages.libclang / llvm to buildInputs and -Duse_libclang=ON to cmakeFlags.
   • Locally: point a Devbox package at a local flake that overrides doxygen, e.g. doxygen.overrideAttrs (old: { buildInputs = old.buildInputs ++ [ llvmPackages.libclang llvmPackages.llvm ]; cmakeFlags = old.cmakeFlags ++ [ "-Duse_libclang=ON" ]; }). I haven't tested this, and it builds from source because the override isn't in the binary cache.

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