Nix flake hostname troubleshooting
Have you seen this error?
building the system configuration...
error: flake 'git+file:///Users/matt/nixfiles' does not provide attribute 'packages.aarch64-darwin.darwinConfigurations.Bebop.system', 'legacyPackages.aarch64-darwin.darwinConfigurations.Bebop.system' or 'darwinConfigurations.Bebop.system'
I ran into this and it took me about a month before I realized that I had changed my hostname and that is why my nix flake was no longer building.