submodules yay

syslinux-b> Switched to a new branch 'fetchgit'
syslinux-b> Submodule 'gnu-efi' (git://git.code.sf.net/p/gnu-efi/code) registered for path 'gnu-efi'
syslinux-b> Cloning into '/nix/store/fx3kgvhax8rafs1ns6sg7rjzblvfg3wp-syslinux-b404870/gnu-efi'...
syslinux-b> remote: Enumerating objects: 229, done.
syslinux-b> remote: Counting objects: 100% (229/229), done.
syslinux-b> remote: Compressing objects: 100% (225/225), done.
syslinux-b> remote: Total 229 (delta 53), reused 39 (delta 2)        B/s
syslinux-b> Receiving objects: 100% (229/229), 236.84 KiB | 134.00 KiB/s, done.
syslinux-b> Resolving deltas: 100% (53/53), done.
syslinux-b> remote: Total 0 (delta 0), reused 0 (delta 0)
syslinux-b> remote: Total 0 (delta 0), reused 0 (delta 0)
syslinux-b> fatal: bad object d34132e62f666904158c7ec2f1eef5a9d5281c36
syslinux-b> error: remote did not send all necessary objects
syslinux-b> fatal: Fetched in submodule path 'gnu-efi', but it did not contain d34132e62f666904158c7ec2f1eef5a9d5281c36. Direct fetching of that commit failed.
syslinux-b> remote: Total 0 (delta 0), reused 0 (delta 0)
syslinux-b> fatal: bad object d34132e62f666904158c7ec2f1eef5a9d5281c36
syslinux-b> error: git://git.code.sf.net/p/gnu-efi/code did not send all necessary objects
syslinux-b>
syslinux-b> fatal: Fetched in submodule path 'gnu-efi', but it did not contain d34132e62f666904158c7ec2f1eef5a9d5281c36. Direct fetching of that commit failed.