Our company is in the same boat - we have this weird, custom package management system that's a franken-hybrid of shell scripts, vanilla Python, Scons, and CMak

Our company is in the same boat - we have this weird, custom package management system that's a franken-hybrid of shell scripts, vanilla Python, Scons, and CMake. Every time I have to do anything even slightly outside of the norm with it, it breaks badly. And there's this huge sunk-cost that makes it functionally impossible to suggest replacing with anything else. It mostly works but it's getting crustier by the day. So I feel your pain.