error in compiling dirty unicorn

Gyp timestamp: /home/edwin270/du/out/target/product/i777/obj/GYP/third_party_icu_icui18n_gyp_intermediates/icui18n.stamp
Gyp timestamp: /home/edwin270/du/out/target/product/i777/obj/GYP/third_party_icu_icuuc_gyp_intermediates/icuuc.stamp
Traceback (most recent call last):
Traceback (most recent call last):
  File "../build/scripts/rule_bison.py", line 75, in <module>
  File "../build/scripts/rule_bison.py", line 75, in <module>
        returnCode = subprocess.call([bisonExe, '-d', '-p', prefix, inputFile, '-o', outputCpp])
returnCode = subprocess.call([bisonExe, '-d', '-p', prefix, inputFile, '-o', outputCpp])
  File "/usr/lib/python2.7/subprocess.py", line 522, in call
  File "/usr/lib/python2.7/subprocess.py", line 522, in call
        return Popen(*popenargs, **kwargs).wait()
return Popen(*popenargs, **kwargs).wait()
  File "/usr/lib/python2.7/subprocess.py", line 710, in __init__
  File "/usr/lib/python2.7/subprocess.py", line 710, in __init__
        errread, errwrite)
errread, errwrite)
  File "/usr/lib/python2.7/subprocess.py", line 1327, in _execute_child
  File "/usr/lib/python2.7/subprocess.py", line 1327, in _execute_child
        raise child_exception
raise child_exception
OSErrorOSError: : [Errno 2] No such file or directory[Errno 2] No such file or directory

make: *** [/home/edwin270/du/out/target/product/i777/obj/GYP/shared_intermediates/blink/CSSGrammar.cpp] Error 1
make: *** Waiting for unfinished jobs....
make: *** [/home/edwin270/du/out/target/product/i777/obj/GYP/shared_intermediates/blink/XPathGrammar.cpp] Error 1
target StaticLib: third_party_WebKit_Source_heap_blink_heap_gyp (/home/edwin270/du/out/target/product/i777/obj/STATIC_LIBRARIES/third_party_WebKit_Source_heap_blink_heap_gyp_intermediates/third_party_WebKit_Source_heap_blink_heap_gyp.a)
target StaticLib: third_party_libwebp_libwebp_dec_gyp (/home/edwin270/du/out/target/product/i777/obj/STATIC_LIBRARIES/third_party_libwebp_libwebp_dec_gyp_intermediates/third_party_libwebp_libwebp_dec_gyp.a)