After many failed attempts trying to get the right version of NodeJS, I could land on version 8.15.4 which ran "NPM INSTALL" without failures... but the GULP BUILD failed miserably.

Can you please add some instructions? Versions required? It doesn't seem to work.

Here it is the shortened output (for brevity):

Building: C:\nodejs\node.exe C:\dev\SPFx\True-Script-Editor\node_modules\node-gyp\bin\node-gyp.js rebuild --verbose --libsass_ext= --libsass_cflags= --libsass_ldflags= --libsass_library=
gyp info it worked if it ends with ok
gyp verb cli [ 'C:\nodejs\node.exe',
gyp verb cli 'C:\dev\SPFx\True-Script-Editor\node_modules\node-gyp\bin\node-gyp.js',
gyp verb cli 'rebuild',
gyp verb cli '--verbose',
gyp verb cli '--libsass_ext=',
gyp verb cli '--libsass_cflags=',
gyp verb cli '--libsass_ldflags=',
gyp verb cli '--libsass_library=' ]
gyp info using [email protected]
gyp info using [email protected] | win32 | x64
gyp verb command rebuild []
gyp verb command clean []
gyp verb clean removing "build" directory
gyp verb command configure []
gyp verb check python checking for Python executable "python2" in the PATH
gyp verb which failed Error: not found: python2
..
...
...... and so on and on.....