graphics/glslang: unbreak without ninja
CMake Error at /usr/local/share/cmake/Modules/FindPackageHandleStandardArgs.cmake:218 (message):
Could NOT find PythonInterp (missing: PYTHON_EXECUTABLE) (Required is at least version "3")
Call Stack (most recent call first):
/usr/local/share/cmake/Modules/FindPackageHandleStandardArgs.cmake:582 (_FPHSA_FAILURE_MESSAGE) /usr/local/share/cmake/Modules/FindPythonInterp.cmake:169 (FIND_PACKAGE_HANDLE_STANDARD_ARGS) CMakeLists.txt:233 (find_package) CMakeLists.txt:239 (find_host_package)
Obtained from: DPorts