Build error: Cant find mono for some reason on Void

[Ehiffi]

Void distributes mono 6.12.0.199 yet cmake can't find it

-- Checking for module 'mono>=5.18'
--   No package 'mono' found
CMake Error at /usr/share/cmake-3.27/Modules/FindPkgConfig.cmake:607 (message):
  A required package was not found
Call Stack (most recent call first):
  /usr/share/cmake-3.27/Modules/FindPkgConfig.cmake:829 (_pkg_check_modules_internal)
  bindings/mono/CMakeLists.txt:177 (pkg_check_modules)


-- Configuring incomplete, errors occurred!

Maybe mono is hidden in some other directory that cmake doesn't check?