use ls-sorted order

main.go

@@ -24,7 +24,7 @@ func main() {
 		}
 	}
 
-	files := map[string]os.FileInfo{}
+	files := []string{}
 
 	for _, binDir := range binDirs {
 		fi, err := os.Stat(binDir)
@@ -42,13 +42,13 @@ func main() {
 			continue
 		}
 		for _, di := range dirInfo {
-			files[filepath.Join(binDir, di.Name())] = di
+			files = append(files, filepath.Join(binDir, di.Name()))
 		}
 	}
 
 	execs := []string{}
 	buf := &bytes.Buffer{}
-	for name, _ := range files {
+	for _, name := range files {
 		buf.Reset()
 		if !exists(name) {
 			log.Fatal("this should never happen: file we just found isn't there now")