diff -Naur a/tools/attr.c b/tools/attr.c
--- a/tools/attr.c	2024-08-03 05:18:35.620953300 -0400
+++ b/tools/attr.c	2024-08-03 05:19:17.751848345 -0400
@@ -28,6 +28,7 @@
 #include <errno.h>
 #include <string.h>
 #include <locale.h>
+#include <libgen.h>
 
 #include <attr/attributes.h>