ace build error

ace_build_error

praj-mba:ace praj$ ./Makefile.dryice.js normal
# ace ---------
copy.source.commonjs is deprecated, pass { project:... includes:...} directly as a source
Failed to find module: ../../../../../lib/fixoldbrowsers
Failed to find module: ../../../../../lib/dom
Failed to find module: ../../../../../lib/event
Failed to find module: ../../../../../editor
Failed to find module: ../../../../../edit_session
Failed to find module: ../../../../../undomanager
Failed to find module: ../../../../../virtual_renderer
Failed to find module: ../../../../../theme/textmate
- Source without filename passed to moduleDefines(). Skipping addition of define(...) wrapper.

node.js:201
        throw e; // process.nextTick error, or 'error' event on first tick
              ^
TypeError: Object.keys called on non-object
    at Function.keys (native)
    at cloneProject (/Users/praj/src/ace/Makefile.dryice.js:391:12)
    at buildAce (/Users/praj/src/ace/Makefile.dryice.js:290:30)
    at ace (/Users/praj/src/ace/Makefile.dryice.js:113:5)
    at main (/Users/praj/src/ace/Makefile.dryice.js:74:9)
    at Object.<anonymous> (/Users/praj/src/ace/Makefile.dryice.js:444:5)
    at Module._compile (module.js:432:26)
    at Object..js (module.js:450:10)
    at Module.load (module.js:351:31)
    at Function._load (module.js:310:12)