pkgs.tests.haskell.cabalSdist: Avoid IFD

pkgs/test/haskell/cabalSdist/default.nix

@@ -1,7 +1,7 @@
 { lib, haskellPackages, runCommand }:
 
 let
-  localRaw = haskellPackages.callCabal2nix "local" ./local {};
+  localRaw = haskellPackages.callPackage ./local/generated.nix {};
 in
 lib.recurseIntoAttrs rec {
 

pkgs/test/haskell/cabalSdist/local/generated.nix

@@ -0,0 +1,12 @@
+# nix run ../../../../..#cabal2nix -- ./.
+{ mkDerivation, base, lib }:
+mkDerivation {
+  pname = "local";
+  version = "0.1.0.0";
+  src = ./.;
+  isLibrary = false;
+  isExecutable = true;
+  executableHaskellDepends = [ base ];
+  description = "Nixpkgs test case";
+  license = lib.licenses.mit;
+}