Given the use of the --pod-template-annotation kjob flag (e.g., via xpk run), kjob v0.1.0 does not work for the latest XPK v0.8.0 (I have not tested prior versions). However, the linked README.md documentation emphasizes a v0.1.0 installation from release binaries. I believe documentation should be updated to highlight the need for an installation from source (main branch), or the XPK system should be adapted for compatibility with v0.1.0.
Aside: v0.2.0-devel does not solve this issue, as this tag is (confusingly) on the same commit as v0.1.0 https://github.com/kubernetes-sigs/kjob/tags