--- a/src/backend/commands/collationcmds.c
+++ b/src/backend/commands/collationcmds.c
@@ -611,7 +611,7 @@ pg_import_system_collations(PG_FUNCTION_ARGS)
 		aliases = (CollAliasData *) palloc(maxaliases * sizeof(CollAliasData));
 		naliases = 0;
 
-		locale_a_handle = OpenPipeStream("locale -a", "r");
+		locale_a_handle = OpenPipeStream("@locale@ -a", "r");
 		if (locale_a_handle == NULL)
 			ereport(ERROR,
 					(errcode_for_file_access(),