Trying to fix bootstrap process on Windows

external/wil.lml

 
 Name: WIL
 
-Include-Path: wil/include
+Include-Path: repo/wil/include

tools/bootstrap.py

     assert len(generated) == 1, repr(generated)
     exe, = generated
     dest = prebuild_dir / exe.name
+    if dest.exists():
+        dest.unlink()
     exe.rename(dest)
     return dest
 

tools/build.py

 @contextmanager
 def _generate_toolchain(cxx: str):
     with tempfile.NamedTemporaryFile(
-            suffix='-dds-toolchain.dds', mode='wb') as f:
+            suffix='-dds-toolchain.dds', mode='wb', delete=False) as f:
         comp_id = 'GNU'
         flags = ''
         link_flags = ''
             Link-Flags: {link_flags}'''
         print('Using generated toolchain file: ' + content)
         f.write(content.encode('utf-8'))
-        f.flush()
+        f.close()
         yield Path(f.name)
+        os.unlink(f.name)
 
 
 def main(argv: Sequence[str]) -> int: