showDep (Pkg pn vr) = "requires pkg-config package "
                      ++ display pn ++ display vr
                      ++ ", not found in the pkg-config database"
showDep (Pkg pn vr) = "requires pkg-config package "
                      ++ display pn ++ display vr
                      ++ ", not found in the pkg-config database"
showDep (Pkg pn vr) = "requires pkg-config package "
                      ++ display pn ++ display vr
                      ++ ", not found in the pkg-config database"