nixpkgs/pkgs/development/tools/haskell/BNFC/default.nix

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{ cabal, mtl, fetchpatch, alex, happy }:
cabal.mkDerivation (self: {
pname = "BNFC";
version = "2.6.0.3";
sha256 = "0i38rwslkvnicnlxbrxybnwkgfin04lnr4q12lcvli4ldp2ylfjq";
isLibrary = true;
isExecutable = true;
buildDepends = [ mtl ];
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buildTools = [ alex happy ];
patches = [ (fetchpatch { url = "https://github.com/BNFC/bnfc/pull/3.patch"; sha256 = "1i87crwva5m3v095lv3zxs38pr6nmly58krlr6sxpwnakpr0pxsp"; }) ];
patchFlags = "-p2";
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preConfigure = "runhaskell Setup.lhs clean";
meta = {
homepage = "http://bnfc.digitalgrammars.com/";
description = "A compiler front-end generator";
license = "GPL";
platforms = self.ghc.meta.platforms;
maintainers = [
self.stdenv.lib.maintainers.andres
self.stdenv.lib.maintainers.simons
];
};
})