simply staying on stable channel makes this a non-problem :)
Besides, Nix is even better for such breakages. If GCC breaks you packages, the system does not build and never gets into broken state, all the while old system remains available and kicking.
Besides, Nix is even better for such breakages. If GCC breaks you packages, the system does not build and never gets into broken state, all the while old system remains available and kicking.