bindings.js:83 Uncaught Error: Module version mismatch. Expected 50, got 48

[nphias]

node version : 6.8.1 (same error for LTS version)
mac osx: 10.11 (el capitan)
xcode 8 installed
framework: (electron)

tried reinstall etc..

[email protected] install ../node_modules/memwatch-next

node-gyp rebuild

CXX(target) Release/obj.target/memwatch/src/heapdiff.o
CXX(target) Release/obj.target/memwatch/src/init.o
../src/init.cc:20:17: warning: 'AddGCEpilogueCallback' is deprecated
[-Wdeprecated-declarations]
v8::V8::AddGCEpilogueCallback(memwatch::after_gc);
^
/Users/x/.node-gyp/6.8.1/include/node/v8.h:6475:12: note:
'AddGCEpilogueCallback' has been explicitly marked deprecated here
void AddGCEpilogueCallback(GCCallback callback,
^
1 warning generated.
CXX(target) Release/obj.target/memwatch/src/memwatch.o
CXX(target) Release/obj.target/memwatch/src/util.o
SOLINK_MODULE(target) Release/memwatch.node
clang: warning: libstdc++ is deprecated; move to libc++ with a minimum deployment target of OS X 10.9

code: var memwatch = require('memwatch-next');

[Nomia]

Same error here:
init.js:136 Error: Module version mismatch. Expected 50, got 46.
at Error (native)
at process.module.(anonymous function) as dlopen
at Object.Module._extensions..node (module.js:583:18)
at Object.module.(anonymous function) as .node
at Module.load (module.js:473:32)
at tryModuleLoad (module.js:432:12)
at Function.Module._load (module.js:424:3)
at Module.require (module.js:483:17)
at require (internal/module.js:20:19)
at bindings (/Users/xxx/Desktop/wxbot-node/node_modules/memwatch-next/node_modules/bindings/bindings.js:76:44)(anonymous function) @ init.js:136