Add nix derivations

.gitignore

@@ -22,4 +22,5 @@ cabal.sandbox.config
 .tmp1
 .tmp2
 .tmp3
-.stack-work
\ No newline at end of file
+.stack-work
+result

release.nix

+{ packages ? (_: []), systemPackages ? (_: []) }:
+
+let
+  pkgs = import <nixpkgs> {};
+  src = pkgs.lib.cleanSource ./.;
+  displays = self: builtins.listToAttrs (
+    map
+      (display: { name = display; value = self.callCabal2nix display "${src}/ihaskell-display/${display}" {}; })
+      [
+        "ihaskell-aeson"
+        "ihaskell-blaze"
+        "ihaskell-charts"
+        "ihaskell-diagrams"
+        "ihaskell-gnuplot"
+        "ihaskell-hatex"
+        "ihaskell-juicypixels"
+        "ihaskell-magic"
+        "ihaskell-plot"
+        "ihaskell-rlangqq"
+        "ihaskell-static-canvas"
+        "ihaskell-widgets"
+      ]);
+  dontCheck = pkgs.haskell.lib.dontCheck;
+  haskellPackages = pkgs.haskellPackages.override {
+    overrides = self: super: {
+      ihaskell       = dontCheck (
+                          self.callCabal2nix "ihaskell"          src                                   { bin-package-db = null; });
+      ghc-parser        = self.callCabal2nix "ghc-parser"     "${src}/ghc-parser"                      {};
+      ipython-kernel    = self.callCabal2nix "ghc-parser"     "${src}/ipython-kernel"                  {};
+    } // displays self;
+  };
+  ihaskell = haskellPackages.ihaskell;
+  ihaskellEnv = haskellPackages.ghcWithPackages (self: with self; [
+    ihaskell
+    ihaskell-aeson
+    ihaskell-blaze
+    ihaskell-charts
+    ihaskell-diagrams
+    ihaskell-gnuplot
+    ihaskell-hatex
+    ihaskell-juicypixels
+    ihaskell-magic
+    ihaskell-plot
+    # ihaskell-rlangqq
+    ihaskell-static-canvas
+    # ihaskell-widgets
+  ] ++ packages self);
+  jupyter = pkgs.python3.buildEnv.override {
+    extraLibs = with pkgs.python3Packages; [ ipython ipykernel jupyter_client notebook ];
+  };
+  ihaskellSh = pkgs.writeScriptBin "ihaskell-notebook" ''
+    #! ${pkgs.stdenv.shell}
+    export GHC_PACKAGE_PATH="$(echo ${ihaskellEnv}/lib/*/package.conf.d| tr ' ' ':'):$GHC_PACKAGE_PATH"
+    export PATH="${pkgs.stdenv.lib.makeBinPath ([ ihaskell ihaskellEnv jupyter ] ++ systemPackages pkgs)}"
+    ${ihaskell}/bin/ihaskell install -l $(${ihaskellEnv}/bin/ghc --print-libdir) && ${jupyter}/bin/jupyter notebook
+  '';
+  profile = "${ihaskell.pname}-${ihaskell.version}/profile/profile.tar";
+in
+pkgs.buildEnv {
+  name = "ihaskell-with-packages";
+  paths = [ ihaskellEnv jupyter ];
+  postBuild = ''
+    . "${pkgs.makeWrapper}/nix-support/setup-hook"
+    ln -s ${ihaskellSh}/bin/ihaskell-notebook $out/bin/
+    for prg in $out/bin"/"*;do
+      wrapProgram $prg --set PYTHONPATH "$(echo ${jupyter}/lib/*/site-packages)"
+    done
+  '';
+}