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  1. # shell.nix
  2. { pkgs ? import <nixpkgs> {} }:
  3. let
  4.   project' = pkgs.haskell.lib.addBuildTools
  5.              (pkgs.haskellPackages.callPackage ./default.nix {})
  6.              # i don't understand the line above. Shouldn't hoogle be available only on the package defined below,
  7.              # and not on Snap, which comes from the derivation in default.nix
  8.              [ (pkgs.haskellPackages.ghcWithHoogle (haskellPackages: with haskellPackages; [
  9.                        ghcid
  10.                        # ghc-mod
  11.                        ])) ];
  12. in
  13.   project'.env
  14.  
  15.  
  16. # default.nix
  17. { mkDerivation, base, snap, stdenv }:
  18. mkDerivation {
  19.   pname = "server";
  20.   version = "0.1.0.0";
  21.   src = ./.;
  22.   isLibrary = false;
  23.   isExecutable = true;
  24.   executableHaskellDepends = [ base snap ];
  25.   license = stdenv.lib.licenses.bsd3;
  26. }
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