Failed to exec postinstall script. sh is recognized as an internal or external command

[johnramesh]

I am try to install using command npm install -g devkit on windows 8 system.

following error throws.

I am also install "Cygwin".But "sh" is not recognized in my command prompt.Please Help me.

12677 info devkit@3.1.1 Failed to exec postinstall script 12678 info C:\Users\johnramesh\AppData\Roaming\npm\node_modules\devkit unbuild 12679 info preuninstall devkit@3.1.1 12680 info uninstall devkit@3.1.1 12681 verbose true,C:\Users\johnramesh\AppData\Roaming\npm\node_modules,C:\Users\johnramesh\AppData\Roaming\npm\node_modules unbuild devkit@3.1.1 12682 verbose C:\Users\johnramesh\AppData\Roaming\npm,[object Object] binRoot 12683 info postuninstall devkit@3.1.1 12684 error devkit@3.1.1 postinstall: sh scripts/postinstall.sh 12684 error Exit status 1 12685 error Failed at the devkit@3.1.1 postinstall script. 12685 error This is most likely a problem with the devkit package, 12685 error not with npm itself. 12685 error Tell the author that this fails on your system: 12685 error sh scripts/postinstall.sh 12685 error You can get their info via: 12685 error npm owner ls devkit 12685 error There is likely additional logging output above. 12686 error System Windows_NT 6.2.9200 12687 error command "C:\Program Files\nodejs\node.exe" "C:\Program Files\nodejs\node_modules\npm\bin\npm-cli.js" "install" "-g" "devkit" 12688 error cwd C:\Windows\system32 12689 error node -v v0.10.28 12690 error npm -v 1.4.9 12691 error code ELIFECYCLE 12692 verbose exit [ 1, true ]

[johnramesh]

I installed msys,then it installed.