Code to build Stackage with Nix

automated/nix-build/README.md

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+# Building Stackage with Nix
+
+The script `build.sh` is supposed to be run in a directory where `curator unpack`
+was run - it assumes existence of `unpack-dir` directory with a Stackage
+snapshot `stack.yaml` and unpacked packages in it.

automated/nix-build/build.sh

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+#!/usr/bin/env bash
+
+set -eu +x
+
+NIX_VERSION="2.0.4"
+curl https://nixos.org/releases/nix/nix-$NIX_VERSION/install | sh
+
+# no code to install stack2nix yet
+
+stack2nix --cabal2nix-args="--no-hpack" unpack-dir > snapshot.nix
+
+nix build -f snapshot-fixed.nix

automated/nix-build/fetch-nixpkgs.nix

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+let
+  spec = builtins.fromJSON (builtins.readFile ./nixpkgs-src.json);
+  src = import <nix/fetchurl.nix> {
+    url = "https://github.com/${spec.owner}/${spec.repo}/archive/${spec.rev}.tar.gz";
+    inherit (spec) sha256;
+  };
+  nixcfg = import <nix/config.nix>;
+in builtins.derivation {
+  system = builtins.currentSystem;
+  name = "${src.name}-unpacked";
+  builder = builtins.storePath nixcfg.shell;
+  inherit src;
+  args = [
+    (builtins.toFile "builder" ''
+      $coreutils/mkdir $out
+      cd $out
+      $gzip -d < $src | $tar -x --strip-components=1
+    '')
+  ];
+  coreutils = builtins.storePath nixcfg.coreutils;
+  tar = builtins.storePath nixcfg.tar;
+  gzip = builtins.storePath nixcfg.gzip;
+}

automated/nix-build/nixpkgs-src.json

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+{
+    "owner":  "NixOS",
+    "repo":   "nixpkgs",
+    "rev":    "c2950341d038995bf46a7b72db961bb3d3e9ac12",
+    "sha256": "0ghirjm6xvsihci3fladrn4nrnh2yr529v7c406hmw0yp25kv0i4"
+}

automated/nix-build/snapshot-fixed.nix

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+{ pkgs ? import (import ./fetch-nixpkgs.nix) {}
+, compiler ? pkgs.haskell.packages.ghc863
+}:
+let
+  snapshot = import ./snapshot.nix { pkgs = pkgs; compiler = compiler; };
+in
+  snapshot.override (with pkgs.haskell.lib; {
+    overrides = self: super: {
+      # disabling packages from non-hackage-packages.nix
+      futhark = null;
+      multi-ghc-travis = null;
+      vaultenv = null;
+      # native deps
+      check-email = super.check-email.override { resolv = null; };
+      flac = super.flac.override { FLAC = pkgs.flac; };
+      freenect = super.freenect.override { freenect_sync = null; libfreenect = null; };
+      haskell-gi = super.haskell-gi.override { gobject-introspection = pkgs.gnome3.gobjectIntrospection; };
+      HDBC-mysql = super.HDBC-mysql.override { mysqlclient = pkgs.mysql;};
+      libffi = super.libffi.override { ffi = null; };
+      # fixes
+      blas-ffi = overrideCabal super.blas-ffi (
+        old: { libraryPkgconfigDepends = old.libraryPkgconfigDepends ++ [ pkgs.openblasCompat ]; }
+      );
+      odbc = overrideCabal super.odbc (
+        old: { librarySystemDepends = old.librarySystemDepends ++ [ pkgs.freetds ]; }
+      );
+      html-entities = null; # https://github.com/nikita-volkov/html-entities/issues/8
+      category = null; # conflict in Prelude.hs
+      constraint = null; # because of category
+      lame = null; # fails with 'Total ticks: 451489'
+      proto-lens-protobuf-types = overrideCabal super.proto-lens-protobuf-types (
+      old: { libraryToolDepends = old.libraryToolDepends ++ [ pkgs.protobuf ]; }
+      );
+      # libraft = null; # xxx/postgres/entries.sql: openFile: does not exist (No such file or directory) in libraft-0.2.0.0
+      xmlbf-xeno = null; # because of html-entities
+      xmonad = null; # xmonad requires extra patches for Nix
+      xmonad-contrib = null;
+      xmonad-extras = null;
+      hlibgit2 = disableHardening super.hlibgit2 [ "format" ];
+    };
+  })