diff --git a/pkgs/diff-flake/default.nix b/pkgs/diff-flake/default.nix
index 090aa6d..c085e67 100644
--- a/pkgs/diff-flake/default.nix
+++ b/pkgs/diff-flake/default.nix
@@ -5,13 +5,13 @@ stdenvNoCC.mkDerivation rec {
 
   src = ./diff-flake;
 
-  phases = [ "buildPhase" "installPhase" "fixupPhase" ];
-
   buildInputs = [
     makeWrapper
     shellcheck
   ];
 
+  dontUnpack = true;
+
   buildPhase = ''
     shellcheck $src
   '';