NPM Installation error with incompatible python vresions

[edison0xyz]

Installation error reported:

> scrypt@6.0.3 preinstall /Users/<user>/Desktop/testing_folder/kaya/node_modules/scrypt
> node node-scrypt-preinstall.js
> fsevents@1.2.4 install /Users/<user>/Desktop/testing_folder/kaya/node_modules/fsevents
> node install
node-pre-gyp WARN Tried to download(404): https://fsevents-binaries.s3-us-west-2.amazonaws.com/v1.2.4/fse-v1.2.4-node-v67-darwin-x64.tar.gz
node-pre-gyp WARN Pre-built binaries not found for fsevents@1.2.4 and node@11.6.0 (node-v67 ABI, unknown) (falling back to source compile with node-gyp)
gyp ERR! configure error
gyp ERR! stack Error: Command failed: /Users/<user>/.pyenv/shims/python -c import sys; print "%s.%s.%s" % sys.version_info[:3];
gyp ERR! stack   File "<string>", line 1
gyp ERR! stack     import sys; print "%s.%s.%s" % sys.version_info[:3];
gyp ERR! stack                                ^
gyp ERR! stack SyntaxError: invalid syntax
gyp ERR! stack
gyp ERR! stack     at ChildProcess.exithandler (child_process.js:294:12)
gyp ERR! stack     at ChildProcess.emit (events.js:188:13)
gyp ERR! stack     at maybeClose (internal/child_process.js:978:16)
gyp ERR! stack     at Socket.stream.socket.on (internal/child_process.js:395:11)
gyp ERR! stack     at Socket.emit (events.js:188:13)
gyp ERR! stack     at Pipe._handle.close (net.js:610:12)
gyp ERR! System Darwin 18.2.0
gyp ERR! command "/usr/local/Cellar/node/11.6.0/bin/node" "/usr/local/lib/node_modules/npm/node_modules/node-gyp/bin/node-gyp.js" "configure" "--fallback-to-build" "--module=/Users/<user>/Desktop/testing_folder/kaya/node_modules/fsevents/lib/binding/Release/node-v67-darwin-x64/fse.node" "--module_name=fse" "--module_path=/Users/<user>/Desktop/testing_folder/kaya/node_modules/fsevents/lib/binding/Release/node-v67-darwin-x64" "--napi_version=3" "--node_abi_napi=napi"
gyp ERR! cwd /Users/<user>/Desktop/testing_folder/kaya/node_modules/fsevents
gyp ERR! node -v v11.6.0
gyp ERR! node-gyp -v v3.8.0
gyp ERR! not ok
node-pre-gyp ERR! build error
node-pre-gyp ERR! stack Error: Failed to execute '/usr/local/Cellar/node/11.6.0/bin/node /usr/local/lib/node_modules/npm/node_modules/node-gyp/bin/node-gyp.js configure --fallback-to-build --module=/Users/<user>/Desktop/testing_folder/kaya/node_modules/fsevents/lib/binding/Release/node-v67-darwin-x64/fse.node --module_name=fse --module_path=/Users/<user>/Desktop/testing_folder/kaya/node_modules/fsevents/lib/binding/Release/node-v67-darwin-x64 --napi_version=3 --node_abi_napi=napi' (1)
node-pre-gyp ERR! stack     at ChildProcess.<anonymous> (/Users/<user>/Desktop/testing_folder/kaya/node_modules/fsevents/node_modules/node-pre-gyp/lib/util/compile.js:83:29)
node-pre-gyp ERR! stack     at ChildProcess.emit (events.js:188:13)
node-pre-gyp ERR! stack     at maybeClose (internal/child_process.js:978:16)
node-pre-gyp ERR! stack     at Process.ChildProcess._handle.onexit (internal/child_process.js:265:5)
node-pre-gyp ERR! System Darwin 18.2.0
node-pre-gyp ERR! command "/usr/local/Cellar/node/11.6.0/bin/node" "/Users/<user>/Desktop/testing_folder/kaya/node_modules/fsevents/node_modules/node-pre-gyp/bin/node-pre-gyp" "install" "--fallback-to-build"
node-pre-gyp ERR! cwd /Users/<user>/Desktop/testing_folder/kaya/node_modules/fsevents
node-pre-gyp ERR! node -v v11.6.0
node-pre-gyp ERR! node-pre-gyp -v v0.10.0
node-pre-gyp ERR! not ok
Failed to execute '/usr/local/Cellar/node/11.6.0/bin/node /usr/local/lib/node_modules/npm/node_modules/node-gyp/bin/node-gyp.js configure --fallback-to-build --module=/Users/<user>/Desktop/testing_folder/kaya/node_modules/fsevents/lib/binding/Release/node-v67-darwin-x64/fse.node --module_name=fse --module_path=/Users/<user>/Desktop/testing_folder/kaya/node_modules/fsevents/lib/binding/Release/node-v67-darwin-x64 --napi_version=3 --node_abi_napi=napi' (1)
> scrypt@6.0.3 install /Users/<user>/Desktop/testing_folder/kaya/node_modules/scrypt
> node-gyp rebuild
gyp ERR! configure error
gyp ERR! stack Error: Command failed: /Users/<user>/.pyenv/shims/python -c import sys; print "%s.%s.%s" % sys.version_info[:3];
gyp ERR! stack   File "<string>", line 1
gyp ERR! stack     import sys; print "%s.%s.%s" % sys.version_info[:3];
gyp ERR! stack                                ^
gyp ERR! stack SyntaxError: invalid syntax
gyp ERR! stack
gyp ERR! stack     at ChildProcess.exithandler (child_process.js:294:12)
gyp ERR! stack     at ChildProcess.emit (events.js:188:13)
gyp ERR! stack     at maybeClose (internal/child_process.js:978:16)
gyp ERR! stack     at Socket.stream.socket.on (internal/child_process.js:395:11)
gyp ERR! stack     at Socket.emit (events.js:188:13)
gyp ERR! stack     at Pipe._handle.close (net.js:610:12)
gyp ERR! System Darwin 18.2.0
gyp ERR! command "/usr/local/Cellar/node/11.6.0/bin/node" "/usr/local/lib/node_modules/npm/node_modules/node-gyp/bin/node-gyp.js" "rebuild"
gyp ERR! cwd /Users/<user>/Desktop/testing_folder/kaya/node_modules/scrypt
gyp ERR! node -v v11.6.0
gyp ERR! node-gyp -v v3.8.0
gyp ERR! not ok
npm WARN optional SKIPPING OPTIONAL DEPENDENCY: fsevents@1.2.4 (node_modules/fsevents):
npm WARN optional SKIPPING OPTIONAL DEPENDENCY: fsevents@1.2.4 install: `node install`
npm WARN optional SKIPPING OPTIONAL DEPENDENCY: Exit status 1
npm ERR! code ELIFECYCLE
npm ERR! errno 1
npm ERR! scrypt@6.0.3 install: `node-gyp rebuild`
npm ERR! Exit status 1
npm ERR!
npm ERR! Failed at the scrypt@6.0.3 install script.
npm ERR! This is probably not a problem with npm. There is likely additional logging output above.
npm ERR! A complete log of this run can be found in:
npm ERR!     /Users/<user>/.npm/_logs/2019-02-16T21_03_31_296Z-debug.log

Unable to replicate on my machine. Will appreciate if anyone can find a workaround if you face the same issue.

[ahoward1024]

If you haven't figured this out already the culprit is here:
Error: Command failed: /Users/<user>/.pyenv/shims/python -c import sys; print "%s.%s.%s" % sys.version_info[:3];

Unfortunately it looks like the node-gyp module isn't playing nicely with pyenv on MacOS.
The only way I was able to solve this was by removing pyenv. Using the system python or switching versions to either 3.7.2 or 2.7.1 did not seem to work

[edison0xyz]

Thanks for pointing the potential fix.
Did you try https://github.com/nodejs/node-gyp#configuring-python-dependency ?