--- ./imap/src/osdep/unix/os_lnx.h.orig	2020-11-04 19:47:00.079064606 +0000
+++ ./imap/src/osdep/unix/os_lnx.h	2020-11-04 19:48:23.228984716 +0000
@@ -58,6 +58,9 @@
 
 #define direct dirent
 
+#define L_SET SEEK_SET
+#define FNDELAY O_NDELAY
+
 int safe_flock (int, int);
 #define flock safe_flock