I think you got confused by the `JL_LIBDIR` variable name. The `./configure` scripts almost always put the `.dll` files in `bin`. I was able to take out several special-cases that used to move/copy them to `lib` when I patched the build process such that we had `JL_LIBDIR = bin != libdir` on Windows. I don't particularly like that `sys.dll` and `sys.ji` are ending up in bindir, but I didn't have the initiative to go fix that.