I use a GPG key to sign my git commits.
An error like this one might be a sign of an expired GPG key.
error: gpg failed to sign the data fatal: failed to write commit object
| ================================== | |
| INSTALLING NIXOS WITH OPT-IN STATE | |
| Based mostly on: | |
| grahamc.com/blog/erase-your-darlings | |
| gist.github.com/mx00s/ea2462a3fe6fdaa65692fe7ee824de3e | |
| nixos.org/manual/nixos/stable/ |