[Fix] Use full path single user package.json file

Author: piranna

scripts/build

@@ -105,9 +105,10 @@ if [[ ! -d $STEP_DIR ]]; then
       eval "$NPMi" -g $SINGLE_USER || exit 24
 
       # Set `/init` to package binary or `server.js` file
+      PACKAGE_JSON=$STEP_DIR/lib/node_modules/$SINGLE_USER/package.json
       (
-        BIN=bin/`pkg-bin $SINGLE_USER` && \
-        ls     $STEP_DIR/$BIN          && \
+        BIN=bin/`pkg-bin $PACKAGE_JSON` && \
+        ls     $STEP_DIR/$BIN           && \
         ln -fs $BIN $STEP_DIR/init
       ) \
       || (