diff --git a/conf/zshrc b/conf/zshrc
index 430412c..5d62737 100644
--- a/conf/zshrc
+++ b/conf/zshrc
@@ -7,17 +7,22 @@ fpath=(~/.zfuncs $fpath)
 
 # $MYPREFIX {{{1
 
-add_myprefix_to() {
+add_to() {
   if [[ `eval echo \$\{\+$1\}` == 1 ]]; then
-    export $1=$MYPREFIX/$2:`eval echo \$\{$1\}`
+    export $1=$2:`eval echo \$\{$1\}`
   else
-    export $1=$MYPREFIX/$2
+    export $1=$2
   fi
 }
 
+add_myprefix_to() {
+  add_to "$1" "$MYPREFIX/$2"
+}
+
 MYPREFIX=~/build/myprefix
 add_myprefix_to PATH bin
 add_myprefix_to PATH sbin
+add_to PATH ~/.gem/ruby/1.8/bin
 add_myprefix_to LD_LIBRARY_PATH lib
 add_myprefix_to LD_LIBRARY_PATH lib64
 add_myprefix_to MANPATH man