message: appveyor: fix path for Cython
diff: @@ -12,6 +12,8 @@ environment:
  #- PYTHON: "C:\\Python35-x64"
  #- TOOLSET: cygwin
  - PYTHON: "C:\\Python37-x64"
  + # add to path otherwise Cython is not found
  + PATH: $(PYTHON)\Scripts;$(PATH)
  # CYGWIN: "c:\\cygwin64"
  install:
  