@jeroen @jimhester It look like the TexLive bundle at https://github.com/jimhester/ubuntu-bin/releases/download/latest/texlive.tar.gz has missing/outdated dependencies for pandoc, even the default version.
Could you consider updating it (see the workaround below), or at least tell your stance on this issue?
P.S. since the OP’s repo has a small test document, it could be used as a test for the bundle.
@dhicks The workaround that I confirm to work is:
before_install:
- tlmgr update --all || true # one package fails to update but that doesn't affect the outcome
- tlmgr install unicode-math lualatex-math pdftexcmds infwarerr luaotfload
- luaotfload-tool --update
cat -n $(which luaotfload-tool) shows that it’s a luatex script and uses the floor division operator // which is new in Lua 5.3 while the stock luatex uses 5.2. So you need to update luatex to run it. I do confirm that luaotfload-tool --update fixes the font issue once it works.
The rest of the installs/updates are to fix unrelated failures after that.