diff --git a/developer/bin/develop_brew_cask b/developer/bin/develop_brew_cask
index 440e23c081..5c828b31e4 100755
--- a/developer/bin/develop_brew_cask
+++ b/developer/bin/develop_brew_cask
@@ -2,6 +2,11 @@
 #
 # develop_brew_cask
 #
+# Called via symlink as:
+#  production_brew_cask
+#
+
+called_as="$(basename $0)"
 
 ###
 ### settings
@@ -61,6 +66,19 @@ not_inside_homebrew () {
     fi
 }
 
+remove_dev_links () {
+    local tap_dir="$1"
+    /bin/rm -- rubylib Casks
+    /bin/mv -- production_rubylib rubylib
+    /bin/mv -- production_Casks   Casks
+    cd "$tap_dir"
+    /bin/rm -- lib Casks
+    /bin/mv -- production_lib   lib
+    /bin/mv -- production_Casks Casks
+    printf "brew-cask is now in production mode\n"
+    printf "It is safe to run 'brew update' if you are in production mode for all Caskroom repos.\n"
+}
+
 create_dev_links () {
     local tap_dir="$1"
     local git_root="$2"
@@ -81,7 +99,23 @@ create_dev_links () {
 ### main
 ###
 
-_develop_brew_cask () {
+_develop_brew_cask_develop_action () {
+    die "brew-cask is already set up for development"
+}
+
+_develop_brew_cask_production_action () {
+    create_dev_links "$tap_dir" "$git_root"
+}
+
+_production_brew_cask_develop_action () {
+    remove_dev_links "$tap_dir"
+}
+
+_production_brew_cask_production_action () {
+    die "brew-cask is already set up for production"
+}
+
+_main () {
 
     # initialization
     cd_to_project_root
@@ -97,15 +131,15 @@ _develop_brew_cask () {
     # action
     cd_to_version_dir "$cellar_dir" "$version_dir"
     if [[ -e "production_rubylib" ]]; then
-        die "brew-cask is already set up for development"
+        eval "_${called_as}_develop_action"
     else
-        create_dev_links "$tap_dir" "$git_root"
+        eval "_${called_as}_production_action"
     fi
 
 }
 
-# process args
-if [[ $1 =~ ^-+h(elp)?$ ]]; then
+_develop_brew_cask_usage () {
+
     printf "develop_brew_cask
 
 Symlink private repo directories into Homebrew's Cellar, so
@@ -120,10 +154,42 @@ Note: it is not safe to run 'brew update' while development
 mode is in effect.
 
 "
+
+}
+
+_production_brew_cask_usage () {
+
+    printf "production_brew_cask
+
+Undo all symlinks created by 'develop_brew_cask' so that the
+'brew cask' command will use only released code and Casks
+within Homebrew.
+
+After running this command it is safe to run 'brew update',
+unless you are using similar scripts to create symlinks into
+other Caskroom development repos.
+
+"
+
+}
+
+# ensure we're called by a valid name
+case "${called_as}" in
+    develop_brew_cask) ;;
+    production_brew_cask) ;;
+    *)
+        die "ERROR: name ${called_as} not recognized"
+        ;;
+esac
+
+
+# process args
+if [[ $1 =~ ^-+h(elp)?$ ]]; then
+    eval "_${called_as}_usage"
     exit
 fi
 
 # dispatch main
-_develop_brew_cask "${@}"
+_main "${@}"
 
 #
diff --git a/developer/bin/production_brew_cask b/developer/bin/production_brew_cask
deleted file mode 100755
index 55a30281fd..0000000000
--- a/developer/bin/production_brew_cask
+++ /dev/null
@@ -1,123 +0,0 @@
-#!/bin/bash
-#
-# production_brew_cask
-#
-
-###
-### settings
-###
-
-set -e               # exit on any uncaught error
-set +o histexpand    # don't expand history expressions
-shopt -s nocasematch # case-insensitive regular expressions
-
-###
-### configurable global variables
-###
-
-tap_subdir="Library/Taps/caskroom/homebrew-cask"
-
-###
-### functions
-###
-
-warn () {
-    local message="$@"
-    message="${message//\\t/$'\011'}"
-    message="${message//\\n/$'\012'}"
-    message="${message%"${message##*[![:space:]]}"}"
-    printf "%s\n" "$message" 1>&2
-}
-
-die () {
-    warn "$@"
-    exit 1
-}
-
-cd_to_project_root () {
-    local script_dir="$(/usr/bin/dirname "$0")"
-    cd "$script_dir"
-    local git_root="$(git rev-parse --show-toplevel)"
-    if [[ -z "$git_root" ]]; then
-        die "ERROR: Could not find git project root"
-    fi
-    cd "$git_root"
-}
-
-cd_to_version_dir () {
-    local cellar_dir="$1"
-    local version_dir="$2"
-    if [[ -z "$version_dir" ]]; then
-        die "ERROR: Could not find version dir under $cellar_dir/"
-    fi
-    cd "$cellar_dir/$version_dir"
-}
-
-not_inside_homebrew () {
-    local tap_dir="$1"
-    local git_root="$2"
-    if [[ "$(/usr/bin/stat -L -f '%i' -- "$tap_dir")" -eq "$(/usr/bin/stat -L -f '%i' -- "$git_root")" ]]; then
-        die "\nERROR: Run this script in your private repo, not inside Homebrew.\n"
-    fi
-}
-
-remove_dev_links () {
-    local tap_dir="$1"
-    /bin/rm -- rubylib Casks
-    /bin/mv -- production_rubylib rubylib
-    /bin/mv -- production_Casks   Casks
-    cd "$tap_dir"
-    /bin/rm -- lib Casks
-    /bin/mv -- production_lib   lib
-    /bin/mv -- production_Casks Casks
-    printf "brew-cask is now in production mode\n"
-    printf "It is safe to run 'brew update' if you are in production mode for all Caskroom repos.\n"
-}
-
-###
-### main
-###
-
-_production_brew_cask () {
-
-    # initialization
-    cd_to_project_root
-    local git_root="$(/bin/pwd)"
-    local brew_prefix="$(brew --prefix)"
-    local cellar_dir="$brew_prefix/Cellar/brew-cask"
-    local version_dir="$(/bin/ls -- "$cellar_dir/" | /usr/bin/sort | /usr/bin/tail -1)"
-    local tap_dir="$brew_prefix/$tap_subdir"
-
-    # sanity check
-    not_inside_homebrew "$tap_dir" "$git_root"
-
-    # action
-    cd_to_version_dir "$cellar_dir" "$version_dir"
-    if [[ -e "production_rubylib" ]]; then
-        remove_dev_links "$tap_dir"
-    else
-        die "brew-cask is already set up for production"
-    fi
-
-}
-
-# process args
-if [[ $1 =~ ^-+h(elp)?$ ]]; then
-    printf "production_brew_cask
-
-Undo all symlinks created by 'develop_brew_cask' so that the
-'brew cask' command will use only released code and Casks
-within Homebrew.
-
-After running this command it is safe to run 'brew update',
-unless you are using similar scripts to create symlinks into
-other Caskroom development repos.
-
-"
-    exit
-fi
-
-# dispatch main
-_production_brew_cask "${@}"
-
-#
diff --git a/developer/bin/production_brew_cask b/developer/bin/production_brew_cask
new file mode 120000
index 0000000000..4afaf77a65
--- /dev/null
+++ b/developer/bin/production_brew_cask
@@ -0,0 +1 @@
+develop_brew_cask
\ No newline at end of file