When executing npm install on VSTS hosted machine, node-gyp rebuild fails for contextify package.
2017-11-09T00:16:37.9310105Z d:\a\1\s\Client\node_modules\contextify>if not defined npm_config_node_gyp (node "C:\Program Files\nodejs\node_modules\npm\bin\node-gyp-bin\\..\..\node_modules\node-gyp\bin\node-gyp.js" rebuild ) else (node "" rebuild )
2017-11-09T00:16:39.2998078Z gyp ERR! configure error
2017-11-09T00:16:39.3018079Z gyp ERR! stack Error: Python executable "C:\Program Files\Python36\python.EXE" is v3.6.2, which is not supported by gyp.
2017-11-09T00:16:39.3028072Z gyp ERR! stack You can pass the --python switch to point to Python >= v2.5.0 & < 3.0.0.
2017-11-09T00:16:39.3028072Z gyp ERR! stack at failPythonVersion (C:\Program Files\nodejs\node_modules\npm\node_modules\node-gyp\lib\configure.js:454:14)
2017-11-09T00:16:39.3028072Z gyp ERR! stack at C:\Program Files\nodejs\node_modules\npm\node_modules\node-gyp\lib\configure.js:443:9
2017-11-09T00:16:39.3028072Z gyp ERR! stack at ChildProcess.exithandler (child_process.js:197:7)
2017-11-09T00:16:39.3028072Z gyp ERR! stack at emitTwo (events.js:106:13)
2017-11-09T00:16:39.3028072Z gyp ERR! stack at ChildProcess.emit (events.js:191:7)
2017-11-09T00:16:39.3028072Z gyp ERR! stack at maybeClose (internal/child_process.js:877:16)
2017-11-09T00:16:39.3028072Z gyp ERR! stack at Socket.<anonymous> (internal/child_process.js:334:11)
2017-11-09T00:16:39.3028072Z gyp ERR! stack at emitOne (events.js:96:13)
2017-11-09T00:16:39.3028072Z gyp ERR! stack at Socket.emit (events.js:188:7)
2017-11-09T00:16:39.3028072Z gyp ERR! stack at Pipe._handle.close [as _onclose] (net.js:498:12)
The machine is Hosted VS2017. node-gyp requires python 2.7 and VS2015 build tools installed.
Is node-gyp supported on VSTS hosted machines or do I have to maintain my own build machine ?
Build definition (I've removed identifying strings)
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