npm -g update shows unmet dependencies

[VincentVToscano]

Shifter installs just fine but when an npm -g update is performed warnings (beyond what I am showing as there are many) appear. Is this due to a higher node or npm version?

node version
v0.10.32

npm version
2.1.3

Sample of warnings
npm WARN unmet dependency /usr/local/lib/node_modules/shifter/node_modules/gear requires mkdirp@'0.3.x' but will load
npm WARN unmet dependency /usr/local/lib/node_modules/shifter/node_modules/mkdirp,
npm WARN unmet dependency which is version 0.5.0
npm WARN unmet dependency /usr/local/lib/node_modules/shifter/node_modules/gear-lib requires jshint@'2.5.x' but will load
npm WARN unmet dependency /usr/local/lib/node_modules/shifter/node_modules/jshint,
npm WARN unmet dependency which is version 0.9.1
npm WARN unmet dependency /usr/local/lib/node_modules/shifter/node_modules/istanbul requires mkdirp@'0.3.x' but will load
npm WARN unmet dependency /usr/local/lib/node_modules/shifter/node_modules/mkdirp,
npm WARN unmet dependency which is version 0.5.0
npm WARN unmet dependency /usr/local/lib/node_modules/shifter/node_modules/istanbul requires nopt@'2.1.x' but will load
npm WARN unmet dependency /usr/local/lib/node_modules/shifter/node_modules/nopt,
npm WARN unmet dependency which is version 3.0.1
npm WARN unmet dependency /usr/local/lib/node_modules/shifter/node_modules/jshint/node_modules/cli/node_modules/glob requires minimatch@'^1.0.0' but will load
npm WARN unmet dependency /usr/local/lib/node_modules/shifter/node_modules/jshint/node_modules/minimatch,
npm WARN unmet dependency which is version 0.0.5
yuicompressor@2.4.7 /usr/local/lib/node_modules/shifter/node_modules/yuicompressor
npm WARN unmet dependency /usr/local/lib/node_modules/shifter/node_modules/gear requires mkdirp@'0.3.x' but will load
npm WARN unmet dependency /usr/local/lib/node_modules/shifter/node_modules/mkdirp,
npm WARN unmet dependency which is version 0.5.0
npm WARN unmet dependency /usr/local/lib/node_modules/shifter/node_modules/gear-lib requires jshint@'2.5.x' but will load
npm WARN unmet dependency /usr/local/lib/node_modules/shifter/node_modules/jshint,
npm WARN unmet dependency which is version 0.9.1
npm WARN unmet dependency /usr/local/lib/node_modules/shifter/node_modules/istanbul requires mkdirp@'0.3.x' but will load
npm WARN unmet dependency /usr/local/lib/node_modules/shifter/node_modules/mkdirp,
npm WARN unmet dependency which is version 0.5.0
npm WARN unmet dependency /usr/local/lib/node_modules/shifter/node_modules/istanbul requires nopt@'2.1.x' but will load
npm WARN unmet dependency /usr/local/lib/node_modules/shifter/node_modules/nopt,
npm WARN unmet dependency which is version 3.0.1