Do not use "/tmp" in scripts.

Gruntfile.coffee

@@ -1,5 +1,6 @@
 fs = require 'fs'
 path = require 'path'
+os = require 'os'
 
 fm = require 'json-front-matter'
 _ = require 'underscore-plus'
@@ -9,7 +10,8 @@ packageJson = require './package.json'
 module.exports = (grunt) ->
   appName = 'Atom.app'
   [major, minor, patch] = packageJson.version.split('.')
-  buildDir = grunt.option('build-dir') ? '/tmp/atom-build'
+  tmpDir = if process.platform is 'win32' then os.tmpdir() else '/tmp'
+  buildDir = grunt.option('build-dir') ? path.join(tmpDir, 'atom-build')
   shellAppDir = path.join(buildDir, appName)
   contentsDir = path.join(shellAppDir, 'Contents')
   appDir = path.join(contentsDir, 'Resources', 'app')

src/browser/atom-application.coffee

@@ -8,13 +8,14 @@ dialog = require 'dialog'
 fs = require 'fs'
 ipc = require 'ipc'
 path = require 'path'
+os = require 'os'
 net = require 'net'
 shell = require 'shell'
 url = require 'url'
 {EventEmitter} = require 'events'
 _ = require 'underscore-plus'
 
-socketPath = '/tmp/atom.sock'
+socketPath = path.join(os.tmpdir(), 'atom.sock')
 
 # Private: The application's singleton class.
 #

tasks/clean-task.coffee

@@ -1,13 +1,16 @@
 path = require 'path'
+os = require 'os'
 
 module.exports = (grunt) ->
   {rm} = require('./task-helpers')(grunt)
 
   grunt.registerTask 'partial-clean', 'Delete some of the build files', ->
+    tmpdir = if process.platform is 'win32' then os.tmpdir() else '/tmp'
+
     rm grunt.config.get('atom.buildDir')
     rm require('../src/coffee-cache').cacheDir
     rm require('../src/less-compile-cache').cacheDir
-    rm '/tmp/atom-cached-atom-shells'
+    rm path.join(tmpdir, 'atom-cached-atom-shells')
     rm 'atom-shell'
 
   grunt.registerTask 'clean', 'Delete all the build files', ->

tasks/update-atom-shell-task.coffee

@@ -1,5 +1,6 @@
 fs = require 'fs'
 path = require 'path'
+os = require 'os'
 
 request = require 'request'
 formidable = require 'formidable'
@@ -70,7 +71,11 @@ module.exports = (grunt) ->
     else
       null
 
-  getCachePath = (version) -> "/tmp/atom-cached-atom-shells/#{version}"
+  getTempDir = ->
+    if process.platform is 'win32' then os.tmpdir() else '/tmp'
+
+  getCachePath = (version) ->
+    path.join(getTempDir(), 'atom-cached-atom-shells', version)
 
   isAtomShellVersionCached = (version) ->
     grunt.file.isFile(getCachePath(version), 'version')