Uhhhuhh.

fetching git input 'git+https://git.madhouse-project.org/nixos/hister.git'
warning: could not update mtime for file '': No such file or directory
error:
… while updating the lock file of flake 'git+file://.../infrastructure.org/out'

… while updating the flake input 'hister'

… while fetching the input 'git+https://git.madhouse-project.org/nixos/hister.git?ref=v0.15.0'

error: opening file '': No such file or directory

Why did this stop working.