diff --git a/third_party/sqlite3/os_unix.c b/third_party/sqlite3/os_unix.c
index a36a94b1f..4eb0bbb91 100644
--- a/third_party/sqlite3/os_unix.c
+++ b/third_party/sqlite3/os_unix.c
@@ -47,6 +47,8 @@
 #include "libc/stdio/rand.h"
 #include "libc/sysv/consts/lock.h"
 #include "third_party/sqlite3/sqliteInt.h"
+#include "libc/sysv/consts/f.h"
+#include "libc/dce.h"
 #if SQLITE_OS_UNIX /* This file is used on unix only */
 
 /*
@@ -3628,8 +3630,9 @@ static int full_fsync(int fd, int fullSync, int dataOnly){
     struct stat buf;
     rc = osFstat(fd, &buf);
   }
-#elif HAVE_FULLFSYNC
-  if( fullSync ){
+#elif HAVE_FULLFSYNC || defined(__COSMOPOLITAN__)
+  /* [jart] use runtime os detection */
+  if( fullSync && F_FULLFSYNC != -1 ){
     rc = osFcntl(fd, F_FULLFSYNC, 0);
   }else{
     rc = 1;
@@ -3642,7 +3645,13 @@ static int full_fsync(int fd, int fullSync, int dataOnly){
   ** It'd be better to detect fullfsync support once and avoid 
   ** the fcntl call every time sync is called.
   */
-  if( rc ) rc = fsync(fd);
+  if( rc ) {
+    if( IsXnu() ){
+      rc = fsync(fd);
+    }else{
+      rc = fdatasync(fd);
+    }
+  }
 
 #elif defined(__APPLE__)
   /* fdatasync() on HFS+ doesn't yet flush the file size if it changed correctly
diff --git a/third_party/sqlite3/shell.c b/third_party/sqlite3/shell.c
index 2925662ab..d4c113186 100644
--- a/third_party/sqlite3/shell.c
+++ b/third_party/sqlite3/shell.c
@@ -140,7 +140,7 @@ typedef sqlite3_int64 i64;
 typedef sqlite3_uint64 u64;
 typedef unsigned char u8;
 #if SQLITE_USER_AUTHENTICATION
-# include "sqlite3userauth.h"
+# include "third_party/sqlite3/sqlite3userauth.h"
 #endif
 
 #if !defined(_WIN32) && !defined(WIN32)
@@ -11265,6 +11265,7 @@ static void process_sqliterc(
   p->in = inSaved;
   p->lineno = savedLineno;
   sqlite3_free(zBuf);
+  errno = 0; /* [jart] clear error */
 }
 
 /*