diff --git a/flake.nix b/flake.nix
index 539d391..df63845 100644
--- a/flake.nix
+++ b/flake.nix
@@ -39,7 +39,13 @@
         name = "Pantograph";
         #roots = pkgs.lib.optional pkgs.stdenv.isDarwin [ "Main" "Pantograph" ];
         roots = [ "Main" "Pantograph" ];
-        src = ./.;
+        src = pkgs.lib.cleanSourceWith {
+          src = ./.;
+          filter = path: type:
+            !(pkgs.lib.hasInfix "/Test/" path) &&
+            !(pkgs.lib.hasSuffix ".md" path) &&
+            !(pkgs.lib.hasSuffix "Makefile" path);
+        };
       };
       test = leanPkgs.buildLeanPackage {
         name = "Test";
@@ -58,7 +64,6 @@
       packages = {
         inherit (leanPkgs) lean lean-all;
         inherit (project) sharedLib executable;
-        test = test.executable;
         default = project.executable;
       };
       checks = {