v3 tested and builds fine: $ ./pre-inst-env guix build mariadb /gnu/store/f70jymwyfcnsghy4jg8caibci59p8rgq-mariadb-10.5.8-dev /gnu/store/cj3qym1x1jjh02m2g23cqpbhchrbmn6c-mariadb-10.5.8-lib /gnu/store/mpb5bdf1vkwazqfmmwcvskdm50g191bg-mariadb-10.5.8 Since we don't have PoC, I can't verify the rebased patch actually fixes the security issue but it should. That's what we get when manually rebasing stuff to earlier versions. Test suite passes but not sure it actually tests this security issue being fixed. Please review, then I will push, it's been 7 days so, let's get this in.