session "isabelle-hacks" = "HOL" +
  options [timeout = 600, document = pdf, document_variants="document:outline=/proof,/ML",document_output=output]
  theories
    Assert
    Code_Reflection
    Fxp
    Hiding_Type_Variables
    Ml_Yacc_Lib 
    Nano_JSON
    Simple_Oracle
  document_files
    root.tex