Hi, here are a few additional things that I had to change in order to compile the source:

1) Replace spaces in the makefile with tab characters and also replace backslash ("\") with ordinary slash ("/")
2) If you receive some errors while compiling "FSharp.Compatibility" you may need to do the following changes in the source:

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// hashtbl.fsi(140):
val MakeTagged: (#IEqualityComparer<'key>) -> Provider<'key,'a,IEqualityComparer<'key>>
// set.fsi(73):
val MakeTagged: (#IComparer<'a>) -> Provider<'a,IComparer<'a>>
// map.fsi(67):
val MakeTagged: (#IComparer<'key>) -> Provider<'key,'a,IComparer<'key>>

3) Finally, if it reports an error that "System.Net.WebRequest" cannot be found when compiling "control.fs", you may need to remove "--no-framework" flag in the Makefile (in a command that compiles FSharp.Core).

Hope this helps!
T.