diff -ur b/portage-utils-0.9/libq/compat.c a/portage-utils-0.9/libq/compat.c
--- a/portage-utils-0.9/libq/compat.c
+++ b/portage-utils-0.9/libq/compat.c
@@ -56,3 +56,7 @@
 #ifndef O_CLOEXEC
 # define O_CLOEXEC 0
 #endif
+
+#ifndef S_BLKSIZE
+# define S_BLKSIZE 512
+#endif