Why is DeriveGeneric showing an error message? - parsing

Question

I have a haskell file with the below line:
{-# LANGUAGE DeriveGeneric #-}
However, I am getting the below error message on that line:
Failed to parse result of calling cabal
Resolving dependencies...
Build profile: -w ghc-8.6.5 -O1
In order, the following will be built (use -v for more details):
- haskell-translator-0.1.0.0 (exe:haskell-translator) (configuration changed)
Warning: haskell-translator.cabal:24:5:
unexpected 'a'
expecting space, "&&", white space, "||", comma or end of input
base >=4.12 && <4.13
async
cabal: Failed parsing "./haskell-translator.cabal".
And below are the contents of my .cabal file:
name: haskell-translator
version: 0.1.0.0
-- synopsis:
-- description:
license: BSD3
license-file: LICENSE
author: saad.shaikh
maintainer: saad.shaikh.dev#protonmail.com
-- copyright:
-- category:
build-type: Simple
extra-source-files: CHANGELOG.md
cabal-version: >=1.10
executable haskell-translator
main-is: Main.hs
-- other-modules:
-- other-extensions:
build-depends:
base >=4.12 && <4.13
async>=1.2.0 && <1.3
haskell-translator-0.1.0.0
-- hs-source-dirs:
default-language: Haskell2010
What is the reason for the error message?

Answer 1

Your cabal file has some problems with the build-depends section, you shhould separate the items by a comma, and use constrainst so == 0.1.0.0, not -0.1.0.0:
build-depends:
base >=4.12 && <4.13
, async>=1.2.0 && <1.3
, haskell-translator == 0.1.0.0