anchor.diff:  
       // Copy python related files from projectDir to buildDir
       copyFiles libraryDir "*" buildDirPy
  -    copyFiles projectDir "*.py" (buildDirPy </> "fable")
  +    copyFiles projectDir "*.py" (buildDirPy </> "fable_library")
   
       // Fix issues with Fable .fsproj not supporting links
  -    copyDirNonRecursive (buildDirPy </> "fable/fable-library") (buildDirPy </> "fable")
  -    removeDirRecursive (buildDirPy </> "fable/fable-library")
  +    copyDirNonRecursive (buildDirPy </> "fable_library/fable-library") (buildDirPy </> "fable_library")
  +    removeDirRecursive (buildDirPy </> "fable_library/fable-library")
   
   
   let buildPyLibraryIfNotExists() =
  
positive.code:         "--lang Python"
      ]
  
      runInDir buildDir "touch __init__.py" // So relative imports works.
      runInDir buildDir "pytest"
  
  
  
negative.code:     cleanDirs [buildDirPy]
  
      runFableWithArgs projectDir [
          "--outDir " + buildDirPy </> "fable_library"
          "--fableLib " + buildDirPy
          "--lang Python"
          "--exclude Fable.Core"
  