Building fails on Windows 10 through Git Bash with 3.0.6

[radiantmediaplayer]

Have you read the FAQ and checked for duplicate open issues?
Yes

What version of Shaka Player are you using?
3.0.6

Can you reproduce the issue with our latest release version?
Yes

Can you reproduce the issue with the latest code from master?
Yes

Are you using the demo app or your own custom app?
N/A

If custom app, can you reproduce the issue using our demo app?
N/A

What browser and OS are you using?
Latest Windows 10

For embedded devices (smart TVs, etc.), what model and firmware version are you using?
N/A

What are the manifest and license server URIs?
N/A

What did you do?
git clone https://github.com/google/shaka-player.git
git checkout -b rmp-shaka-3.0.6 v3.0.6
python build/build.py +@networking +@Manifests +@text +./node_modules/eme-encryption-scheme-polyfill/index.js +./lib/polyfill/encryption_scheme.js +./lib/polyfill/input_event.js +./lib/polyfill/mathround.js +./lib/polyfill/mediasource.js +./lib/polyfill/patchedmediakeys_ms.js +./lib/polyfill/patchedmediakeys_nop.js +./lib/polyfill/patchedmediakeys_webkit.js +./lib/polyfill/videoplaybackquality.js +./lib/polyfill/vttcue.js

The above commands that did not fail with Shaka player 3.0.5 is now producing an error output with 3.0.6. Note that files in dist/ folder are produced but I want to make sure they are usable. Same issue if adding the --debug flag.

Traceback (most recent call last):
File "build/build.py", line 388, in
shakaBuildHelpers.run_main(main)
File "C:\wamp64\www\shaka-player\build\shakaBuildHelpers.py", line 353, in run_main
sys.exit(main(sys.argv[1:]))
File "build/build.py", line 381, in main
if not custom_build.build_library(name, locales, force, is_debug):
File "build/build.py", line 308, in build_library
if not ts_def_generator.generate(force):
File "C:\wamp64\www\shaka-player\build\compiler.py", line 249, in generate
if shakaBuildHelpers.execute_get_code(cmd_line) != 0:
File "C:\wamp64\www\shaka-player\build\shakaBuildHelpers.py", line 161, in execute_get_code
obj = execute_subprocess(args)
File "C:\wamp64\www\shaka-player\build\shakaBuildHelpers.py", line 150, in execute_subprocess
return subprocess.Popen(args, **kwargs)
File "C:\Python38\lib\subprocess.py", line 854, in init
self._execute_child(args, executable, preexec_fn, close_fds,
File "C:\Python38\lib\subprocess.py", line 1307, in _execute_child
hp, ht, pid, tid = _winapi.CreateProcess(executable, args,
OSError: [WinError 193] %1 is not a valid Win32 application

What did you expect to happen?
No error

What actually happened?
Error

[TheModMaker]

The problem is this line where we try to execute a Python file. We need to use sys.executable to invoke Python instead of the file itself.