diff --git a/pkgs/test/haskell/cabalSdist/local/generated.nix b/pkgs/test/haskell/cabalSdist/local/generated.nix
index bfa299962bcb..f6463e762ddd 100644
--- a/pkgs/test/haskell/cabalSdist/local/generated.nix
+++ b/pkgs/test/haskell/cabalSdist/local/generated.nix
@@ -3,7 +3,14 @@
 mkDerivation {
   pname = "local";
   version = "0.1.0.0";
-  src = ./.;
+  src = lib.fileset.toSource {
+    root = ./.;
+    fileset = lib.fileset.unions [
+      ./app
+      ./CHANGELOG.md
+      ./local.cabal
+    ];
+  };
   isLibrary = false;
   isExecutable = true;
   executableHaskellDepends = [ base ];
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 ];