diff --git a/lib/install.js b/lib/install.js
index 3628d64e02..9a684a8df4 100644
--- a/lib/install.js
+++ b/lib/install.js
@@ -1,23 +1,27 @@
 var Promise = require('./promise')
-var semver = require('semver')
 var debug = require('debug')('pnpm:install')
 var npa = require('npm-package-arg')
+var getUuid = require('node-uuid')
+var fs = require('mz/fs')
+
 var join = require('path').join
 var dirname = require('path').dirname
 var basename = require('path').basename
 var abspath = require('path').resolve
-var mkdirp = require('./fs/mkdirp')
+
 var fetch = require('./fetch')
 var resolve = require('./resolve')
-var getUuid = require('node-uuid')
+
+var mkdirp = require('./fs/mkdirp')
 var symlink = require('./fs/force_symlink')
-var relSymlink = require('./fs/rel_symlink')
-var linkBins = require('./install/link_bins')
-var linkBundledDeps = require('./install/link_bundled_deps')
-var postInstall = require('./install/post_install')
-var fs = require('mz/fs')
 var obliterate = require('./fs/obliterate')
 var requireJson = require('./fs/require_json')
+var relSymlink = require('./fs/rel_symlink')
+
+var linkBins = require('./install/link_bins')
+var linkBundledDeps = require('./install/link_bundled_deps')
+var isAvailable = require('./install/is_available')
+var postInstall = require('./install/post_install')
 
 /*
  * Installs a package.
@@ -86,7 +90,7 @@ module.exports = function install (ctx, pkgSpec, modules, options) {
   var log = ctx.log(pkg.spec) // function
 
   // it might be a bundleDependency, in which case, don't bother
-  return isBundled(pkg.spec, modules)
+  return isAvailable(pkg.spec, modules)
     .then(_ => _
       ? saveCachedResolution()
         .then(data => log('package.json', data))
@@ -141,36 +145,6 @@ module.exports = function install (ctx, pkgSpec, modules, options) {
   }
 }
 
-/*
- * Check if a module exists (eg, `node_modules/node-pre-gyp`). This is the case when
- * it's part of bundleDependencies.
- *
- * This check is also responsible for stopping `pnpm i lodash` from doing anything when
- * 'node_modules/lodash' already exists.
- */
-
-function isBundled (spec, modules) {
-  var name = spec && spec.name
-  if (!name) return Promise.resolve(false)
-
-  var packageJsonPath = join(modules, name, 'package.json')
-
-  return Promise.resolve()
-    .then(_ => fs.readFile(packageJsonPath))
-    .then(_ => JSON.parse(_))
-    .then(_ => verify(spec, _))
-    .catch(err => {
-      if (err.code !== 'ENOENT') throw err
-      return false
-    })
-
-  function verify (spec, packageJson) {
-    return packageJson.name === spec.name &&
-      ((spec.type !== 'range' && spec.type !== 'version') ||
-      semver.satisfies(packageJson.version, spec.spec))
-  }
-}
-
 /*
  * Builds to `.store/lodash@4.0.0` (paths.target)
  * If an ongoing build is already working, use it. Also, if that ongoing build
diff --git a/lib/install/is_available.js b/lib/install/is_available.js
new file mode 100644
index 0000000000..5e87e348a3
--- /dev/null
+++ b/lib/install/is_available.js
@@ -0,0 +1,37 @@
+var Promise = require('./promise')
+var semver = require('semver')
+var join = require('path').join
+var fs = require('mz/fs')
+
+/*
+ * Check if a module exists (eg, `node_modules/node-pre-gyp`). This is the case when
+ * it's part of bundleDependencies.
+ *
+ * This check is also responsible for stopping `pnpm i lodash` from doing anything when
+ * 'node_modules/lodash' already exists.
+ *
+ *     spec = { name: 'lodash', spec: '^3.0.2' }
+ *     isAvailable(spec, 'path/to/node_modules')
+ */
+
+module.exports = function isAvailable (spec, modules) {
+  var name = spec && spec.name
+  if (!name) return Promise.resolve(false)
+
+  var packageJsonPath = join(modules, name, 'package.json')
+
+  return Promise.resolve()
+    .then(_ => fs.readFile(packageJsonPath))
+    .then(_ => JSON.parse(_))
+    .then(_ => verify(spec, _))
+    .catch(err => {
+      if (err.code !== 'ENOENT') throw err
+      return false
+    })
+
+  function verify (spec, packageJson) {
+    return packageJson.name === spec.name &&
+      ((spec.type !== 'range' && spec.type !== 'version') ||
+      semver.satisfies(packageJson.version, spec.spec))
+  }
+}