diff --git a/pkgs/tools/inputmethods/skk/skk-dicts/default.nix b/pkgs/tools/inputmethods/skk/skk-dicts/default.nix
index bc9aa73c2fc6..d165f404f6cb 100644
--- a/pkgs/tools/inputmethods/skk/skk-dicts/default.nix
+++ b/pkgs/tools/inputmethods/skk/skk-dicts/default.nix
@@ -33,7 +33,8 @@ stdenv.mkDerivation {
   srcs = [ small medium large edict assoc ];
   nativeBuildInputs = [ skktools ] ++ lib.optional stdenv.isDarwin libiconv;
 
-  phases = [ "installPhase" ];
+  dontUnpack = true;
+
   installPhase = ''
     function dictname() {
       src=$1