I just realized that my x86_64 and Loongson 3A systems have spent an enormous amount of time building the new guix master branch based on outdated bootstrap/*/guile-2.0.9.tar.xz. The issue is that if you simply "git pull" from a build directory with older versions of bootstrap/*/guile-2.0.9.tar.xz, although the various places where the hashes are stored are updated, those new hashes are never checked against the existing files. Therefore, you can proceed to build an entire system based on an outdated bootstrap guile, and with hashes that don't match what's on hydra and what other people are building. It would be good if the hashes were checked even if they are already present in the build directory. Mark