Install target does not install C library headers correctly

[Ravenwater]

I just tried compiling and installing the Stillwater flavor of unums which failed with

CMake Error at c_api/pure_c/posit/cmake_install.cmake:50 (file):
file INSTALL cannot find
"PREFIX/universal/c_api/pure_c/posit/posit_c_api.h":
No such file or directory.

where PREFIX is where I downloaded everything etc.
Is the header file supposed to be there?
I don’t have it, and it doesn’t show in your tree on github, either. Is it missing from commits, or do I just misunderstand the way it’s supposed to work?

what I did: • check out 724f766
(current head-of-branch wouldn’t do)
• manually edit CMakeLists to use standard c++17
and to turn BUILD_CI_CHECK ON
• both make and make test worked just fine

kind regards,
Hauke Rehr