+Termux is effectively a single-user system so chown:ing
+does not make much sense.
+
+Without this patch npm fails with EPERM on chown
+for cache.json when first building the local index.
+diff -u -r ../node-v0.12.7/deps/npm/lib/cache/update-index.js ./deps/npm/lib/cache/update-index.js
+--- ../node-v0.12.7/deps/npm/lib/cache/update-index.js 2015-07-09 18:41:19.000000000 -0400
++++ ./deps/npm/lib/cache/update-index.js 2015-07-24 20:45:21.078116384 -0400
+@@ -4,7 +4,7 @@
+ var assert = require('assert')
+ var path = require('path')
+ var mkdir = require('mkdirp')
+-var chownr = require('chownr')
++var chownr = function(path, uid, gid, cb) { cb(null); }
+ var npm = require('../npm.js')
+ var log = require('npmlog')
+ var cacheFile = require('npm-cache-filename')