--- a/explain/syscall/ustat.c

+++ b/explain/syscall/ustat.c

@@ -30,7 +30,7 @@

 #include <explain/syscall/ustat.h>

-#ifndef HAVE_USTAT

+#if !defined(HAVE_USTAT_H) && !defined(LINUX_TYPES_H_STRUCT_USTAT)

 struct ustat

 {

--- a/libexplain/buffer/enfile.c

+++ b/libexplain/buffer/enfile.c

@@ -38,7 +38,7 @@ get_maxfile(void)

 {

     if (explain_option_dialect_specific())

     {

-#ifdef __linux__

+#ifdef SYS__sysctl

         /*

          * In the linux kernel, if get_empty_filp() returns NULL, the open

          * system call (and others) will return ENFILE.

--- a/libexplain/buffer/errno/listen.c

+++ b/libexplain/buffer/errno/listen.c

@@ -72,7 +72,7 @@ append_getsockname(explain_string_buffer_t *sb, int fildes)

 static int

 get_somaxconn(void)

 {

-#ifdef __linux__

+#ifdef SYS__sysctl

     struct __sysctl_args args;

     long somaxconn;

     size_t somaxconn_size = sizeof(somaxconn);