diff --git a/HELP.md b/HELP.md
index 5e5236157d..b1a44d9d3a 100644
--- a/HELP.md
+++ b/HELP.md
@@ -443,6 +443,7 @@ Some config options can be overridden with environment variables, such as:
 - `CLOUDCMD_AUTH` - enable authentication
 - `CLOUDCMD_USERNAME` - set username
 - `CLOUDCMD_PASSWORD` - set password
+- `CLOUDCMD_PREFIX` - set url prefix
 - `CLOUDCMD_ROOT` - set root directory
 - `CLOUDCMD_VIM` - enable vim hot keys
 - `CLOUDCMD_CONFIRM_COPY` - confirm copy
diff --git a/bin/cloudcmd.js b/bin/cloudcmd.js
index a72f22414d..bfc631f38d 100755
--- a/bin/cloudcmd.js
+++ b/bin/cloudcmd.js
@@ -92,7 +92,7 @@ const args = require('minimist')(argv.slice(2), {
         'zip'         : config('zip'),
         'username'    : env('username') || config('username'),
         'root'        : choose(env('root'), config('root')),
-        'prefix'      : config('prefix'),
+        'prefix'      : choose(env('cloudcmd_prefix'), config('prefix')),
         'console'     : choose(env.bool('console'), config('console')),
         'contact'     : choose(env.bool('contact'), config('contact')),
         'terminal'    : choose(env.bool('terminal'), config('terminal')),