yo backbone scaffolding failing due to "bower-requirejs.js" tasks...ERROR

[pmandala]

pmandala-mac:yoBackbone pmandala$ grunt build
Loading "bower-requirejs.js" tasks...ERROR

Error: Cannot find module 'bower'

Running "clean:dist" (clean) task

1 path cleaned.

Running "createDefaultTemplate" task

Running "jst:compile" (jst) task

Destination not written because compiled files were empty.

Running "sass:dist" (sass) task
Fatal error: undefined is not a function

Execution Time (2015-10-13 23:35:34 UTC)
loading tasks 771ms ▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇▇ 96%
jst:compile 19ms ▇▇ 2%
Total 807ms

pmandala-mac:yoBackbone pmandala$ npm install --save bower-requirejs

node-sass@1.2.3 install /Users/pmandala/X-Work/yoBackbone/node_modules/grunt-sass/node_modules/node-sass
node scripts/install.js

Binary downloaded and installed at /Users/pmandala/X-Work/yoBackbone/node_modules/grunt-sass/node_modules/node-sass/vendor/darwin-x64/binding.node

node-sass@1.2.3 postinstall /Users/pmandala/X-Work/yoBackbone/node_modules/grunt-sass/node_modules/node-sass
node scripts/build.js

darwin-x64 exists; testing
module.js:355
Module._extensions[extension](this, filename);
^
Error: Module did not self-register.
at Error (native)
at Module.load (module.js:355:32)
at Function.Module._load (module.js:310:12)
at Module.require (module.js:365:17)
at require (module.js:384:17)
at Object. (/Users/pmandala/X-Work/yoBackbone/node_modules/grunt-sass/node_modules/node-sass/lib/index.js:181:15)
at Module._compile (module.js:460:26)
at Object.Module._extensions..js (module.js:478:10)
at Module.load (module.js:355:32)
at Function.Module._load (module.js:310:12)
yobackbone@0.0.0 /Users/pmandala/X-Work/yoBackbone
├── UNMET PEER DEPENDENCY bower@^1.x
└── bower-requirejs@1.2.0

npm WARN EPEERINVALID grunt-bower-requirejs@1.1.1 requires a peer of bower@^1.x but none was installed.
npm WARN EPEERINVALID bower-requirejs@1.2.0 requires a peer of bower@^1.x but none was installed.
npm WARN EPACKAGEJSON yobackbone@0.0.0 No description
npm WARN EPACKAGEJSON yobackbone@0.0.0 No repository field.
npm WARN EPACKAGEJSON yobackbone@0.0.0 No license field.
npm ERR! Darwin 14.5.0
npm ERR! argv "node" "/usr/local/bin/npm" "install" "--save" "bower-requirejs"
npm ERR! node v0.12.5
npm ERR! npm v3.3.7
npm ERR! code ELIFECYCLE

npm ERR! node-sass@1.2.3 postinstall: node scripts/build.js
npm ERR! Exit status 1
npm ERR!
npm ERR! Failed at the node-sass@1.2.3 postinstall script 'node scripts/build.js'.
npm ERR! This is most likely a problem with the node-sass package,
npm ERR! not with npm itself.
npm ERR! Tell the author that this fails on your system:
npm ERR! node scripts/build.js
npm ERR! You can get their info via:
npm ERR! npm owner ls node-sass
npm ERR! There is likely additional logging output above.

npm ERR! Please include the following file with any support request:
npm ERR! /Users/pmandala/X-Work/yoBackbone/npm-debug.log

[pmandala]

Unable to attach npm-debug.log

[bezoerb]

@pmandala you're using npm 3 which doesn't support peerDependencies anymore.
Try npm install --save-dev bower