You can search for identifiers within the package.
in-package search v0.2.0
picasso
graphX.ml
1 2 3 # 1 "src/backends/graphics/graphX.ko.ml" let build _render = raise (Manager.BackendError "graphics not found on your system")
1 2 3
# 1 "src/backends/graphics/graphX.ko.ml" let build _render = raise (Manager.BackendError "graphics not found on your system")