4 files changed, 86 insertions, 59 deletions
diff --git a/default.nix b/default.nix
index 543f571..ab8089b 100644
--- a/default.nix
+++ b/default.nix
@@ -1,4 +1,7 @@
+let
+  nixpkgs = import "${builtins.fetchTarball (import ./pack/nixpkgs.nix)}" {};
+in
 {
-depo = import ./depo;
-pack = import ./pack;
+  depo = import ./depo;
+  pack = import ./pack { inherit nixpkgs; };
 }
diff --git a/lore/bild.nix b/lore/bild.nix
new file mode 100644
index 0000000..8a6d510
--- /dev/null
+++ b/lore/bild.nix
@@ -0,0 +1,49 @@
+{
+  # a common build function
+  #
+  # see example usage in pack/ibb.nix. this is not set in stone, obviously. we
+  # should figure out how to use overlays, for one.
+  #
+  bild = file: { nixpkgs }:
+    with nixpkgs;
+    let
+      pack = import file;
+
+      depsToPackageSet = packageSet: deps:
+        map (s: builtins.getAttr s packageSet) deps;
+
+      ghc = pkgs.haskell.packages.ghc844.ghcWithPackages (hp:
+        depsToPackageSet hp
+          ([ "hinotify" ] ++ pack.deps.both ++ pack.deps.apex));
+
+      ghcjs_ = pkgs.haskell.packages.ghcjs.override (oldAttrs: {
+        overrides = with pkgs.haskell.lib; self: super: {
+          http-types = dontCheck super.http-types;
+          tasty-quickcheck = dontCheck super.tasty-quickcheck;
+          scientific = dontCheck super.scientific; # takes forever
+          servant = dontCheck super.servant;
+          comonad = dontCheck super.comonad;
+          QuickCheck = dontCheck super.QuickCheck;
+        };
+      });
+
+      ghcjs = ghcjs_.ghcWithPackages (hp:
+        depsToPackageSet hp (pack.deps.both ++ pack.deps.aero));
+
+      make = ../chip/make;
+    in
+    stdenv.mkDerivation {
+      name = pack.name;
+      version = "0";
+      src = ../.;
+      nativeBuildInputs = [
+        ghc ghcjs
+      ];
+      strictDeps = true;
+      buildPhase = "${ghc}/bin/runhaskell ${make} ${pack.name}";
+      installPhase = ''
+        mkdir -p $out/bin
+        cp bild/${pack.name} $out/bin/${pack.name}
+      '';
+    };
+}
diff --git a/pack/default.nix b/pack/default.nix
index 3e7ff2d..db2a655 100644
--- a/pack/default.nix
+++ b/pack/default.nix
@@ -1,10 +1,11 @@
-{ nixpkgs ? import "${builtins.fetchTarball (import ./nixpkgs.nix)}" {}
-}:
+{ nixpkgs }:
+
+with import ../lore/bild.nix;
 
 {
   bs = import ./bs.nix { inherit nixpkgs; };
   cmdwave = import ./cmdwave.nix { inherit nixpkgs; };
   duree = import ./duree.nix { inherit nixpkgs; };
   fathom = import ./fathom.nix { inherit nixpkgs; };
-  ibb = import ./ibb.nix { inherit nixpkgs; };
+  ibb = bild ./ibb.nix { inherit nixpkgs; };
 }
diff --git a/pack/ibb.nix b/pack/ibb.nix
index fe74346..c531a34 100644
--- a/pack/ibb.nix
+++ b/pack/ibb.nix
@@ -1,56 +1,30 @@
-{ nixpkgs }:
-with nixpkgs;
-let
-  ghc = pkgs.haskell.packages.ghc844.ghcWithPackages (hp: with hp; [
-    hinotify
-
-    acid-state
-    blaze-html
-    blaze-markup
-    bytestring
-    miso
-    MonadRandom
-    protolude
-    random
-    scotty
-    servant
-    servant-server
-    shakespeare
-    text
-  ]);
-  ghcjs_ = pkgs.haskell.packages.ghcjs.override (oldAttrs: {
-    overrides = with pkgs.haskell.lib; self: super: {
-      http-types = dontCheck super.http-types;
-      tasty-quickcheck = dontCheck super.tasty-quickcheck;
-      scientific = dontCheck super.scientific; # takes forever
-      servant = dontCheck super.servant;
-      comonad = dontCheck super.comonad;
-      QuickCheck = dontCheck super.QuickCheck;
-    };
-  });
-  ghcjs = ghcjs_.ghcWithPackages (hp: with hp; [
-    aeson
-    containers
-    ghcjs-base
-    miso
-    protolude
-    servant
-    text
-  ]);
-  make = ../chip/make;
-  entrypoint = "Ibb";
-in
-stdenv.mkDerivation rec {
+{
   name = "ibb";
-  version = "0";
-  src = ../.;
-  nativeBuildInputs = [
-    ghc ghcjs
-  ];
-  strictDeps = true;
-  buildPhase = "${ghc}/bin/runhaskell ${make} ibb";
-  installPhase = ''
-    mkdir -p $out/bin
-    cp bild/${name} $out/bin/${name}
-  '';
+  deps = {
+    both = [
+      "miso"
+      "protolude"
+      "servant"
+      "text"
+    ];
+    apex = [
+      "MonadRandom"
+      "acid-state"
+      "blaze-html"
+      "blaze-markup"
+      "bytestring"
+      "ixset"
+      "random"
+      "safecopy"
+      "scotty"
+      "servant-server"
+      "shakespeare"
+      "text"
+    ];
+    aero = [
+      "aeson"
+      "containers"
+      "ghcjs-base"
+    ];
+  };
 }