From 6548659e7762ee6243e19cce1905c0b8832a5e26 Mon Sep 17 00:00:00 2001
From: Anton-Latukha <anton.latukha@gmail.com>
Date: Wed, 3 Jun 2020 20:33:14 +0300
Subject: [PATCH] default.nix: allow apply composition over the package

M  default.nix
---
 default.nix | 11 ++++++++++-
 1 file changed, 10 insertions(+), 1 deletion(-)

diff --git a/default.nix b/default.nix
index d66062c..7c2c021 100644
--- a/default.nix
+++ b/default.nix
@@ -119,6 +119,15 @@ let
   haskellPackages = pkgs.haskell.packages.${compiler}.override
     overrideHaskellPackages;
 
+  listOfSetsOfSwitchExtend =
+    [
+    ];
+
+  funcOnSwitchAplliesFunction = set: object:
+    if set.switch
+      then set.function object
+      else object;
+
   # General description of package
   package = haskellPackages.developPackage {
     name = "hnix";
@@ -162,7 +171,7 @@ let
     returnShellEnv = false;
   };
 
-  composedPackage = package;
+  composedPackage = pkgs.lib.foldr (funcOnSwitchAplliesFunction) package listOfSetsOfSwitchExtend;
 
 in composedPackage