nixpkgs/pkgs/fetchsvn/fetchsvn-native.fix

Function(["name","url","dir","rev"],
  Package(
    [ ("name", Var("name"))
    , ("build", Relative("fetchsvn/fetchsvn.sh"))
    , ("url",   Var("url"))
    , ("dir",   Var("dir"))
    , ("rev",   Var("rev"))
    ]
  )
)