I built an image with stack image container in a subdir and I see a left-over cruft directory left behind in the sub-directory.
% find .stack-work
.stack-work
.stack-work/image
.stack-work/image/0
.stack-work/image/0/usr
.stack-work/image/0/usr/local
.stack-work/image/0/usr/local/bin
.stack-work/image/0/usr/local/bin/xyz
.stack-work/image/0/Dockerfile