I am preparing the computer lab machine for a course this summer
and I am running into a strange "ninja issue".
...
CMake Error: CMake was unable to find a build program corresponding
to "Ninja". CMAKE_MAKE_PROGRAM is not set. You probably need to select a
different build tool.
Odd, but this certainly looks like a cmake/ninja issue, nothing
IMP-specific. You might need to explicitly set CMAKE_MAKE_PROGRAM - I
think cmake only looks in /usr/bin/ for ninja. Alternatively, make a
minimal CMakeLists.txt that demonstrates the problem and report it to
the cmake folks.