/nix/store/8vjw6aczx24i2s3dwyxlqxcmay5wscv8-hlint-check.drv

cardano-testnet/src/Testnet/Start/Types.hs:4:1-35: Warning: Unused LANGUAGE pragma
Found:
  {-# LANGUAGE NumericUnderscores #-}
Perhaps you should remove it.

1 hint
=====================================================================
Note: to ignore a particular hint (e.g. "Reduce duplication"), write
this in the source file:
{-# ANN module ("HLint: ignore Reduce duplication" :: Text) #-}
You can also apply it just to a particular function, which is better:
{-# ANN funcName ("HLint: ignore Reduce duplication" :: Text) #-}