Take dhall from x86_64-linux nixpkgs

flake.nix

@@ -65,7 +65,7 @@
         forAllCrossSystems ({ system, localSystem, crossSystem }:
           nixpkgs.lib // (import ./lib {
             inherit system localSystem crossSystem;
-            apps = self.apps.${system};
+            localPackages = nixpkgs.legacyPackages.${localSystem};
             genodepkgs = self;
             nixpkgs = nixpkgsFor.${system};
           }));

lib/default.nix

@@ -1,4 +1,4 @@
-{ system, localSystem, crossSystem, genodepkgs, nixpkgs, apps }:
+{ system, localSystem, crossSystem, genodepkgs, nixpkgs, localPackages }:
 
 let
   thisSystem = builtins.getAttr system;
@@ -17,7 +17,7 @@ in rec {
 
   runDhallCommand = name: env: script:
     nixpkgs.runCommand name (env // {
-      nativeBuildInputs = [ buildPackages.dhall ]
+      nativeBuildInputs = [ localPackages.dhall ]
         ++ env.nativeBuildInputs or [ ];
     }) ''
       ${dhallCachePrelude}
@@ -45,7 +45,7 @@ in rec {
     nixpkgs.stdenv.mkDerivation {
       name = name + "-hw-image";
       build = compileBoot name env boot;
-      nativeBuildInputs = [ buildPackages.dhall ];
+      nativeBuildInputs = [ localPackages.dhall ];
       buildCommand = let
         bootstrapDhall =
           # snippet used to nest core.elf into image.elf