My NixOS installation fails because at the end of installation process the installer cannot save EFI variables. This is because the efivars partition is full. What can I do to fix this and complete the installation process?
(all command were run on Ubuntu Live CD as currently I only have Windows installed)
/sys/firmware/efi/efivars
is full:
ubuntu@ubuntu:~$ df -h
Filesystem Size Used Avail Use% Mounted on
tmpfs 4.7G 3.1M 4.7G 1% /run
efivarfs 128K 126K 0 100% /sys/firmware/efi/efivars
/dev/mapper/ventoy 5.8G 5.8G 0 100% /cdrom
/cow 24G 309M 24G 2% /
tmpfs 24G 8.0K 24G 1% /dev/shm
tmpfs 5.0M 12K 5.0M 1% /run/lock
tmpfs 24G 8.0K 24G 1% /tmp
tmpfs 4.7G 164K 4.7G 1% /run/user/1000
Surprisingly, the total sum of all efivars is circa 60kB, half of the total partition size
ubuntu@ubuntu:~$ du -b /sys/firmware/efi/efivars/* | awk '{sum += $1} END {print sum}'
61508
And the efivars which take the most space
ubuntu@ubuntu:~$ du -b /sys/firmware/efi/efivars/* | sort -nr | head -10
22396 /sys/firmware/efi/efivars/dbx-d719b2cb-3d3a-4596-a3bc-dad00e67656f
10160 /sys/firmware/efi/efivars/dbxDefault-8be4df61-93ca-11d2-aa0d-00e098032b8c
6058 /sys/firmware/efi/efivars/dbDefault-8be4df61-93ca-11d2-aa0d-00e098032b8c
6058 /sys/firmware/efi/efivars/db-d719b2cb-3d3a-4596-a3bc-dad00e67656f
3568 /sys/firmware/efi/efivars/KEKDefault-8be4df61-93ca-11d2-aa0d-00e098032b8c
3568 /sys/firmware/efi/efivars/KEK-8be4df61-93ca-11d2-aa0d-00e098032b8c
2052 /sys/firmware/efi/efivars/_DMI-91b89306-5bac-4ae0-aab3-207ec12e989b
1128 /sys/firmware/efi/efivars/MokListRT-605dab50-e046-4300-abb6-3dd810dd8b23
881 /sys/firmware/efi/efivars/PKDefault-8be4df61-93ca-11d2-aa0d-00e098032b8c
881 /sys/firmware/efi/efivars/PK-8be4df61-93ca-11d2-aa0d-00e098032b8c
What are my options, to be able to install NixOS? I want to be extra careful, as I don’t want to break the existing Windows installation (which is Bitlockered).
Can I just replace the content of dbx
with dbxDefault
?