EOS CI fails to build PAYG image due to "symlinkat: Operation not permitted"

[starnight]

EOS CI fails to build PAYG image due to "symlinkat: Operation not permitted":

error: Preparing final bootloader swap: symlinkat: Operation not permitted

consoleText.txt

[starnight]

Wondering the error comes from sd-boot related things? Endless OS PAYG image uses sd-boot, instead of GRUB.

[starnight]

This has been identified in #101

[dbnicholson]

EPERM The filesystem containing linkpath does not support the creation of symbolic links.

This is almost certainly because ostree is trying to use a real symlink on VFAT. It should be using the fake symlink hacks there. Either the hacks in ostree weren't brought forward or they no longer work correctly on current ostree.

[ssssam]

We are using upstream OSTree so far. I take it we need to use a patched Endless version?

[dbnicholson]

Yes. Someday maybe ostreedev/ostree#3359 can be used, but even then it will involve a complicated migration to get away from the FAT hacks we currently have for existing systems.