nix-0.1.0.0: src/System/Nix/Flake/Develop.hs

-- | Working with @nix develop@
module System.Nix.Flake.Develop (
  inNixShell,
) where

{- | Check if running inside a nix develop shell

This function checks for the IN_NIX_SHELL environment variable,
which is set by @nix develop@.
-}
inNixShell :: (MonadIO m) => m Bool
inNixShell = do
  isJust <$> lookupEnv "IN_NIX_SHELL"