haskell overrides: admit old overrides

1 files changed, 8 insertions, 4 deletions

diff --git a/tv/5pkgs/haskell/default.nix b/tv/5pkgs/haskell/default.nix
index fcede2f9c..33fd2506a 100644
--- a/tv/5pkgs/haskell/default.nix
+++ b/tv/5pkgs/haskell/default.nix
@@ -10,11 +10,15 @@ in
     haskell = super.haskell // {
       packages = mapAttrs (name: value:
         if hasAttr "override" value
-          then value.override { inherit overrides; }
+          then value.override (old: {
+            overrides =
+              composeExtensions (old.overrides or (_: _: { })) overrides;
+          })
           else value
       ) super.haskell.packages;
     };
-    haskellPackages = super.haskellPackages.override {
-      inherit overrides;
-    };
+    haskellPackages = super.haskellPackages.override (old: {
+      overrides =
+        composeExtensions (old.overrides or (_: _: { })) overrides;
+    });
   }