patsje.patch

diff --git a/src/unix/fs.c b/src/unix/fs.c
index f0bf81a..97233ab 100644
--- a/src/unix/fs.c
+++ b/src/unix/fs.c
@@ -41,6 +41,7 @@
 # include <sys/sendfile.h>
 #elif defined(__APPLE__) || defined(__FreeBSD__)
 # include <sys/socket.h>
+# include <sys/file.h>
 # include <sys/uio.h>
 #endif

@@ -436,8 +437,7 @@ static ssize_t uv__fs_write(uv_fs_t* req) {
    * a dup().
    */
 #if defined(__APPLE__)
-  static pthread_mutex_t lock = PTHREAD_MUTEX_INITIALIZER;
-  pthread_mutex_lock(&lock);
+  flock(req->file, LOCK_EX);
 #endif

   if (req->off < 0)
@@ -446,7 +446,7 @@ static ssize_t uv__fs_write(uv_fs_t* req) {
     r = pwrite(req->file, req->buf, req->len, req->off);

 #if defined(__APPLE__)
-  pthread_mutex_unlock(&lock);
+  flock(req->file, LOCK_UN);
 #endif

   return r;