--- a/src/luan/modules/IoLuan.java	Fri Apr 17 11:16:38 2020 -0600
+++ b/src/luan/modules/IoLuan.java	Fri Apr 17 13:56:57 2020 -0600
@@ -32,6 +32,7 @@
 import javax.naming.NameNotFoundException;
 import javax.naming.directory.Attribute;
 import javax.naming.directory.InitialDirContext;
+import goodjava.io.IoUtils;
 import luan.Luan;
 import luan.LuanTable;
 import luan.LuanFunction;
@@ -456,12 +457,11 @@
 			return file.exists();
 		}
 
-		public void rename_to(Luan luan,Object destObj) throws LuanException {
+		public void rename_to(Luan luan,Object destObj) throws LuanException, IOException {
 			File dest = objToFile(luan,destObj);
 			if( dest==null )
 				throw new LuanException( "bad argument #1 to 'rename_to' (string or file table expected)" );
-			if( !file.renameTo(dest) )
-				throw new LuanException("couldn't rename file "+file+" to "+dest);
+			IoUtils.move(file,dest);
 		}
 
 		public void link_to(Luan luan,Object destObj) throws LuanException, IOException {
@@ -487,20 +487,19 @@
 			return new LuanFile(luan,tmp);
 		}
 
-		public void delete() throws LuanException {
+		public void delete() throws IOException {
 			if( file.exists() )
 				delete(file);
 		}
 
-		private static void delete(File file) throws LuanException {
+		private static void delete(File file) throws IOException {
 			File[] children = file.listFiles();
 			if( children != null && !isSymbolicLink(file) ) {
 				for( File child : children ) {
 					delete(child);
 				}
 			}
-			if( !file.delete() )
-				throw new LuanException("couldn't delete file "+file);
+			IoUtils.delete(file);
 		}
 
 		public void mkdir() throws LuanException {