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ddellacosta/shell.nix Secret

Created March 15, 2019 16:12
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how else would I ensure cabal and cabal2nix are loaded in the shell on a project-specific basis?
Raw
shell.nix
{ nixpkgs ? import ./pinned.nix {}, compiler ? "ghc863" }:
let
inherit (nixpkgs) pkgs;
hpkgs = pkgs.haskell.packages.${compiler};
in
(import ./. { inherit nixpkgs compiler; }).overrideAttrs (oldAttrs: {
nativeBuildInputs = [ hpkgs.cabal-install hpkgs.cabal2nix ];
})
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clever in #nixos gave me this approach which is pretty neat:

{ nixpkgs ? import ./pinned.nix {}, compiler ? "ghc863" }:

let
  inherit (nixpkgs) pkgs;
  hpkgs = pkgs.haskell.packages.${compiler};
in
(hpkgs.callCabal2nix "servant-pt1" ./. {}).env.overrideAttrs(drv: {
  buildInputs = drv.buildInputs ++ [ hpkgs.cabal-install ];
})

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