1 files changed, 13 insertions, 9 deletions
diff --git a/pkgs/default.nix b/pkgs/default.nix
index f893125..660a462 100644
--- a/pkgs/default.nix
+++ b/pkgs/default.nix
@@ -1,15 +1,19 @@
-{ sources ? import ../nix/sources.nix }:
+{ sources ? import ../nix/sources.nix
+}:
 (self: super:
   let pkgs = self; in
   {
     haskell = super.haskell // {
-      packageOverrides = self: super: {
-        acms = self.callCabal2nix "acms" ../acms { };
-        astore = self.callCabal2nix "astore" sources.json2sql { };
-        autotypes = self.callCabal2nix "autotypes" ../autotypes { };
-        frontend = self.callCabal2nix "frontend" ../frontend { };
-        sh = pkgs.haskell.lib.dontCheck (self.callCabal2nix "sh" sources.sh { });
-        websockets = pkgs.haskell.lib.doJailbreak super.websockets;
-      };
+      packageOverrides = pkgs.lib.composeManyExtensions [
+        super.haskell.packageOverrides
+        (self: super: {
+          acms = self.callCabal2nix "acms" ../acms { };
+          astore = self.callCabal2nix "astore" sources.json2sql { };
+          autotypes = self.callCabal2nix "autotypes" ../autotypes { };
+          frontend = self.callCabal2nix "frontend" ../frontend { };
+          sh = pkgs.haskell.lib.dontCheck (self.callCabal2nix "sh" sources.sh { });
+          websockets = pkgs.haskell.lib.doJailbreak super.websockets;
+        })
+      ];
     };
   })