CMake cannot find Kicad package input

[Peter Polidoro <peter@polidoro.io>]

Hi,

I am trying to upgrade the Guix Kicad package from version 5.1.10 
to 5.1.12.

When I upgrade the version and hash of the package definition and 
try to build it, it fails with a CMake error saying the 
OpenCascade header files are missing.

"opencascade-oce" is listed as a package input, just as it is for 
version 5.1.10, which seems to build just fine. I see that 
opencascade-oce is installed in my /gnu/store and I see the header 
files are in the include/oce/ directory within it.

One of the Kicad build options may have changed, perhaps requiring 
"-DKICAD_USE_OCE=ON", but it still fails even when I add that.

Another option is to switch from "opencascade-oce" to 
"opencascade-occt" and switch the build option to 
"-DKICAD_USE_OCC=ON". Then opencascade-occt gets installed into 
/gnu/store and I see the header files in the include/opencascade/ 
directory within it. CMake still fails saying it cannot find the 
opencascade header files.

Do I need to put more information in the Kicad package definition 
to get CMake to find the opencascade header files? Or perhaps do I 
need to modify the opencascade package definition to make CMake 
work properly to find the header files.

Thanks!