diff --git a/flake.nix b/flake.nix
index 58376760b..71f62704a 100644
--- a/flake.nix
+++ b/flake.nix
@@ -320,18 +320,12 @@
           };
           let
             canRunInstalled = currentStdenv.buildPlatform.canExecute currentStdenv.hostPlatform;
-
-            sourceByRegexInverted = rxs: origSrc: final.lib.cleanSourceWith {
-              filter = (path: type:
-                let relPath = final.lib.removePrefix (toString origSrc + "/") (toString path);
-                in ! lib.any (re: builtins.match re relPath != null) rxs);
-              src = origSrc;
-            };
           in currentStdenv.mkDerivation (finalAttrs: {
             name = "nix-${version}";
             inherit version;
 
-            src = sourceByRegexInverted [ "tests/nixos/.*" "tests/installer/.*" ] self;
+            src = self;
+
             VERSION_SUFFIX = versionSuffix;
 
             outputs = [ "out" "dev" "doc" ];