[jonringer117]

Builds break over time[0]. Generally this is from big updates like gcc, glibc, llvm, openssl, etc.

Most software which is maintained upstream and within nixpkgs is fine. But there's a bunch of "cruft" that you accumulate over time.

[0]: https://hydra.nixos.org/jobset/nixpkgs/trunk

P.S. The link above builds for x86_64-linux, aarch64-linux, aarch64-darwin, x86_64-darwin, which also contributes to the failure rate.