diff --git a/flake.nix b/flake.nix
index f92bef2..f6e5043 100644
--- a/flake.nix
+++ b/flake.nix
@@ -49,7 +49,10 @@
                 [ "colortransfer" ]
                 ((self.callCabal2nix "colortransfer" filteredSrc { }).overrideAttrs (oldAttrs: {
                   preBuild = ''
-                    ln -s ${filteredSrc}/test-resources $PWD/test-resources
+                    ls $src
+                    ls $src/test-resources/originals
+                    ls $src/test-resources/processed
+                    cp -r $src/test-resources ./
                   '';
                 }));
             });