old_contents: #!/usr/bin/python
  # This is a platform-independent script to automate building, compiling,
  # and assembling cubeOS. Windows users must have das and dcpu-16 binaries
  # in the cubeOS directory, or in their system PATH location
  from subprocess import call
  import build	#Runs build.py
  assembleStatus = call(["das","-o","cubeOS.bin","cubeOS.dasm16"])
  if (assembleStatus==0):
  	runStatus = call(["dcpu-16","cubeOS.bin"])
  	print "dcpu-16 execution finished with status",runStatus
  else:
  	print "**ASSEMBLY FAILED WITH STATUS ",assembleStatus,"**"
  
new_contents: #!/usr/bin/python2
  # This is a platform-independent script to automate building, compiling,
  # and assembling cubeOS. Windows users must have das and dcpu-16 binaries
  # in the cubeOS directory, or in their system PATH location
  from subprocess import call
  import build	#Runs build.py
  assembleStatus = call(["das","-o","cubeOS.bin","cubeOS.dasm16"])
  if (assembleStatus==0):
  	runStatus = call(["dcpu-16","cubeOS.bin"])
  	print "dcpu-16 execution finished with status",runStatus
  else:
  	print "**ASSEMBLY FAILED WITH STATUS ",assembleStatus,"**"
  
subject: Set Python shebang to python2, since it fails on python3.