Build fails on fontship 0.8.2: No rule to make target '.fontship/FontshipSerif-Regular-subr.otf

[vikahl]

Describe the bug Running fontship Docker container 0.8.2 results in

make: *** No rule to make target '.fontship/FontshipSerif-Regular-subr.otf', needed by 'FontshipSerif-Regular.otf'.  Stop.

Steps to reproduce

$ git log --oneline -1
51dc0ba (HEAD -> master) fix(build): Update usage of ufoLib2 to work on >= 0.12.0

$ docker run --rm -it --volume "$(pwd):/data" --user "$(id -u):$(id -g)" theleagueof/fontship:v0.8.2 make
┏━ Welcome to Fontship ⁨v0.8.2⁩
┠─ Everything seems to be ship shape, anchors up!
┣━ Building target(s) using ‘make’
┖┄ Dumping captured output of ‘make’
make: *** No rule to make target '.fontship/FontshipSerif-Regular-subr.otf', needed by 'FontshipSerif-Regular.otf'.  Stop.
┎┄ End dump
┗━ Fontship run complete
Error: Custom { kind: InvalidInput, error: "Make failed to parse or execute a build plan." }

Expected vs. actual behavior

Expect build to finish without errors.