1 files changed, 56 insertions, 0 deletions
diff --git a/Biz/Bild/Overlay.nix b/Biz/Bild/Overlay.nix
new file mode 100644
index 0000000..b8fe269
--- /dev/null
+++ b/Biz/Bild/Overlay.nix
@@ -0,0 +1,56 @@
+_: pkgs:
+
+let
+  simpleCabalBuilder = self: name:
+      self.callCabal2nix name pkgs.sources.${name} {};
+  buildCabal = self: name: subdir:
+    if isNull subdir then
+      self.callCabal2nix name pkgs.sources.${name} {}
+    else
+      self.callCabal2nix name (pkgs.sources.${name} + "/${subdir}") {};
+in rec
+{
+  pinnedDeps = builtins.attrNames
+    (builtins.removeAttrs pkgs.sources ["__functor"]);
+  overridePinnedDeps = builder: pkgs.lib.genAttrs pinnedDeps builder;
+
+  # Modifies a derivation with our source and version, keeping old build
+  # rules. This will fail if build steps have changed, or if no build
+  # rules are available upstream..
+  overrideSource = name: pkgs.${name}.overrideAttrs (old: old // rec {
+    name = "${name}-${version}";
+    version = pkgs.sources.${name}.version or pkgs.sources.${name}.rev;
+    src = pkgs.sources.${name};
+  });
+
+  haskell = pkgs.haskell // {
+    packages = pkgs.haskell.packages // {
+      ghc865 = pkgs.haskell.packages.ghc865.override (old: {
+        overrides = with pkgs.pkgs.haskell.lib; self: super:
+          overridePinnedDeps (simpleCabalBuilder self) // {
+          acid-state = dontCheck super.acid-state; # mac: "too many open files"
+          servant-auth = buildCabal self "servant-auth" "servant-auth";
+          wai-middleware-metrics = dontCheck super.wai-middleware-metrics;
+        };
+      });
+      ghcjs = pkgs.haskell.packages.ghcjs.override (old: {
+        overrides = with pkgs.haskell.lib; self: super:
+          overridePinnedDeps (simpleCabalBuilder self) // {
+          Glob = dontCheck super.Glob;
+          QuickCheck = dontCheck super.QuickCheck;
+          base-compat-batteries = dontCheck super.http-types;
+          clay = dontCheck super.clay;
+          comonad = dontCheck super.comonad;
+          jsaddle-warp = dontCheck (self.callCabal2nix "jsaddle-warp" "${pkgs.sources.jsaddle}/jsaddle-warp" {});
+          http-types = dontCheck super.http-types;
+          network-uri= dontCheck super.network-uri;
+          scientific = dontCheck super.scientific; # takes forever
+          servant = dontCheck super.servant;
+          servant-auth = buildCabal self "servant-auth" "servant-auth";
+          tasty-quickcheck = dontCheck super.tasty-quickcheck;
+          time-compat = dontCheck super.time-compat;
+        };
+      });
+    };
+  };
+}