@@ -9,6 +9,7 @@ import Distribution.Nixpkgs.Haskell.Stack
99import Distribution.System as System
1010import qualified Distribution.Text as Text
1111import Options.Applicative as Opts
12+import Paths_stack2nix ( version )
1213import Stack.Types
1314import System.Environment
1415import System.FilePath
@@ -65,9 +66,10 @@ options = Options
6566
6667pinfo :: ParserInfo Options
6768pinfo = info
68− ( helper
69− <*> options )
70− ( fullDesc
69+ ( helper
70+ <*> infoOption ("stackage2nix " ++ Text.display version) (long "version" <> help "Show version")
71+ <*> options )
72+ ( fullDesc
7173 <> header "stack2nix converts Stack files into build instructions for Nix." )
7274
7375nixpkgsRepository :: Parser FilePath