diff --git a/flake.nix b/flake.nix
index af0ce5022..2fa16f8e2 100644
--- a/flake.nix
+++ b/flake.nix
@@ -319,12 +319,18 @@
           };
           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 = self;
-
+            src = sourceByRegexInverted [ "tests/nixos/.*" "tests/installer/.*" ] self;
             VERSION_SUFFIX = versionSuffix;
 
             outputs = [ "out" "dev" "doc" ];