The two lock imports are declared, so they are exported by a .def

⭐ CAUGHT BY THIS PACKAGE'S OWN CHECK, WHICH EXISTS FOR EXACTLY THIS.

    declared in src/*.h and exported by no .def:
            NtLockFile
            NtUnlockFile

A declaration in `src/win.h' and an entry in `port/*.def' are two statements of
one fact --- what this package imports from the object manager --- and the second
is what an import library is built from. A declaration without the entry compiles
and does not link, and the check turns that into a line naming the two names
rather than a linker message naming a symbol.

⚠️ It is the same shape as the source-exclusion list in the sibling C library:
a second statement of one fact falls behind the first, and the thing that catches
it is a check that compares them.

Author: Sunrisepeak

port/ntdll.def

@@ -8,10 +8,12 @@ EXPORTS
 NtClose
 NtCreateFile
 NtFlushBuffersFile
+NtLockFile
 NtQueryDirectoryFile
 NtQueryInformationFile
 NtQueryVolumeInformationFile
 NtReadFile
 NtSetInformationFile
+NtUnlockFile
 NtWriteFile
 RtlNtStatusToDosError