From 53f06894e108431799cf23b0069e98f4aeba8d0c Mon Sep 17 00:00:00 2001
From: Philip Taron <philip.taron@gmail.com>
Date: Mon, 17 Jun 2024 09:43:20 -0700
Subject: [PATCH] tests.haskell.setBuildTarget: prevent unnecessary rebuilds

---
 pkgs/test/haskell/setBuildTarget/default.nix | 10 +++++++++-
 1 file changed, 9 insertions(+), 1 deletion(-)

diff --git a/pkgs/test/haskell/setBuildTarget/default.nix b/pkgs/test/haskell/setBuildTarget/default.nix
index f0c78c510449..39d5db698bcd 100644
--- a/pkgs/test/haskell/setBuildTarget/default.nix
+++ b/pkgs/test/haskell/setBuildTarget/default.nix
@@ -7,7 +7,15 @@ let
       mkDerivation {
         pname = "haskell-setBuildTarget";
         version = "0.1.0.0";
-        src = ./.;
+        src = lib.fileset.toSource {
+          root = ./.;
+          fileset = lib.fileset.unions [
+            ./haskell-setBuildTarget.cabal
+            ./Bar.hs
+            ./Foo.hs
+            ./Setup.hs
+          ];
+        };
         isLibrary = false;
         isExecutable = true;
         executableHaskellDepends = [ base ];