search node_modules after normal $PATH

lib/environment.sh

@@ -42,6 +42,6 @@ write_profile() {
 write_export() {
   local bp_dir="$1"
   local build_dir="$2"
-  echo "export PATH=\"$build_dir/.heroku/node/bin:$build_dir/node_modules/.bin:\$PATH\"" > $bp_dir/export
+  echo "export PATH=\"$build_dir/.heroku/node/bin:\$PATH:$build_dir/node_modules/.bin\"" > $bp_dir/export
   echo "export NODE_HOME=\"$build_dir/.heroku/node\"" >> $bp_dir/export
 }

profile/nodejs.sh

@@ -28,7 +28,7 @@ detect_memory() {
   esac
 }
 
-export PATH="$HOME/.heroku/node/bin:$HOME/bin:$HOME/node_modules/.bin:$PATH"
+export PATH="$HOME/.heroku/node/bin:$PATH:$HOME/bin:$HOME/node_modules/.bin"
 export NODE_HOME="$HOME/.heroku/node"
 export NODE_ENV=${NODE_ENV:-production}