npm package.json defined bin module - command not found

I'm getting command not found... on a bin module I defined in my package.json. Why?

In my module's package.json:

  "bin": {
    "testme": "./misc/testme"
  },

./misc/testme script:

#!/usr/bin/env node
console.log("this is a test");

It appears in the node_modules/.bin directory

$ ls node_modules/.bin
acorn       escodegen    gulp        kue-dashboard  ncp                 semver               stylus
cake        esgenerate   gzip-size   lessc          nopt                shjs                 testme
cleancss    esparse      handlebars  make-plural    pretty-bytes        sshpk-conv           uglifyjs
coffee      esvalidate   image-size  messageformat  rc                  sshpk-sign           user-home
dateformat  express      jade        mime           retrieve-arguments  sshpk-verify         uuid
dot-object  geojsonhint  jsonlint    mkdirp         rimraf              strip-indent         watchr
errno       grunt        js-yaml     mustache       sails               strip-json-comments  which

But, after npm install when I run it, I get:

$ testme
bash: testme: command not found...

via eyn