diff --git a/pkgs/tools/graphics/ditaa/default.nix b/pkgs/tools/graphics/ditaa/default.nix
index 79a24ed3841c..cb06e8ba9f16 100644
--- a/pkgs/tools/graphics/ditaa/default.nix
+++ b/pkgs/tools/graphics/ditaa/default.nix
@@ -8,7 +8,7 @@ stdenv.mkDerivation rec {
     sha256 = "1acnl7khz8aasg230nbsx9dyf8716scgb5l3679cb2bdzxisl64l";
   };
 
-  phases = [ "installPhase" ];
+  dontUnpack = true;
 
   installPhase = ''
     mkdir -p "$out/bin"