anchor.diff:  set FSI_30= "C:\Program Files (x86)\Microsoft SDKs\F#\3.0\Framework\v4.0\fsi.exe"
   set FSI_20= "C:\Program Files (x86)\Microsoft F#\v4.0\fsi.exe"
   
  +:: Arguments to be passed to FSI, regardless of which version we're using.
  +set FSI_ARGS=
  +
   :: Try to find the user's installation of F# Interactive.
   if exist %FSI_30% (
     :: VS 2012 / F# 3.0
  
positive.code: 
    :: Set the 'FSI' variable to the path for F# 3.0 Interactive.
    set FSI= %FSI_30%
    set FSI_ARGS= %FSI_ARGS% --define:FSI_VER_3
  
  ) else (
    if exist %FSI_20% (
  
negative.code: )
  
  :: Set variables which hold command-line arguments to be passed to F# Interactive.
  set FSI_ARGS= %FSI_ARGS% -I:NHol^
    --define:DEBUG^
    --define:TRACE^
    --define:USE^
  