diff --git a/flake.nix b/flake.nix
index 95cfe23..b90684a 100644
--- a/flake.nix
+++ b/flake.nix
@@ -11,12 +11,14 @@
 
   outputs = { nixpkgs, utils, ... }:
     let
-      compiler = "ghc92";
+      compiler = "ghc810";
 
       overlay = pkgsNew: pkgsOld: {
         cabal2nix-unwrapped =
           pkgsNew.haskell.lib.justStaticExecutables
-            pkgsNew.haskell.packages."${compiler}".cabal2nix;
+            # use cabal2nix from 9.2 here, because cabal2nix from 8.10 can't
+            # read cabal-version: 3.6
+            pkgsNew.haskell.packages.ghc92.cabal2nix;
 
         haskell = pkgsOld.haskell // {
           packages = pkgsOld.haskell.packages // {
diff --git a/nix-serve-ng.cabal b/nix-serve-ng.cabal
index 2484fe7..adeb263 100644
--- a/nix-serve-ng.cabal
+++ b/nix-serve-ng.cabal
@@ -1,4 +1,4 @@
-cabal-version:      3.6
+cabal-version:      2.2
 name:               nix-serve-ng
 version:            1.0.1
 synopsis:
@@ -60,7 +60,8 @@ executable nix-serve
 
     if os(darwin)
       extra-libraries: c++
-      hsc2hs-options: --cc clang++
+      -- this needs cabal-version: 3.6
+      -- hsc2hs-options: --cc clang++
     elif os(linux)
       extra-libraries: stdc++
     else