ent_vers = [(n, lookupVersion version_env n)
| n <- sortLt lt_occ used_names ]
lt_occ n1 n2 = nameOccName n1 < nameOccName n2
ent_vers = [(n, lookupVersion version_env n)
| n <- sortLt lt_occ used_names ]
lt_occ n1 n2 = nameOccName n1 < nameOccName n2