liborx.so: cannot open shared object file

I see this error when I try to run the game on Fedora 28.

$ ./SpammerTyper
./SpammerTyper: error while loading shared libraries: liborx.so: cannot open shared object file: No such file or directory

I see it in both the packaged build and when I build it myself. I'll try copying liborx into an existing lib path and see if that helps.