As is frequently emphasized on other stacks, because something is on-topic in another stack is not a reason it has to be off-topic on this stack. In this case, on-topic here seems fine.
I'd go with on-topic for such questions, and hold them to the same standard requirements as they would be on Super User, etc. If, as originally posted, the question is of low quality, the community can help the OP refine it (perhaps using chat) so that it becomes a quality question.
Would this be the best place to ask such a question, even if on-topic? If the installation has some twist that makes it a problem unique to the field, then it's probable that users on SU, et al., might not be of much help. OTOH, if the "problem" is common to many other package installs, the needed help might be best found on the other stacks anyway.
From a community stand point, if a package is commonly utilized in the field, whether or not it's also common outside the field, and frequently has tricky issues to get it installed, the question, and eventual answer, will benefit the community, and likely increase its search engine exposure as well. The trade off is that the OP might have to wait longer to get a useful answer to the problem if asked here, rather than on a larger stack.