How does tea work with header-only C or C++ libraries?

[mfts]

asked via Discord by e.dant

How does tea work with header-only C or C++ libraries? Any way to tell conan, cmake or vcpkg about the headers?
Perhaps tea has an include directory similar to Homebrew's /opt/homebrew/include where the headers would go?

[mxcl]

We add to CMAKE_PREFIX_PATH for all pkgs. Make knows what to do. For everything else we add to CPATH.

You can trivially see this by doing a tea +pkg --dry-run to see the environments that are created.