commit 3295cb4865759a71c27ca5fe4ade980c8b69db6c
Author: Érico Rolim <erico.erc@gmail.com>
Date:   Sun Aug 16 15:19:51 2020 -0300

    pathexec_run.c:: add missing header.

diff --git a/src/pathexec_run.c b/src/pathexec_run.c
index 1770ac7..70ac7a8 100644
--- a/runit-2.1.2/src/pathexec_run.c
+++ b/runit-2.1.2/src/pathexec_run.c
@@ -1,5 +1,6 @@
 /* Public domain. */
 
+#include <unistd.h>
 #include "error.h"
 #include "stralloc.h"
 #include "str.h"