diff --git a/pkgs/data/fonts/unifont/default.nix b/pkgs/data/fonts/unifont/default.nix
index 507faae53e35..7fb7387179a9 100644
--- a/pkgs/data/fonts/unifont/default.nix
+++ b/pkgs/data/fonts/unifont/default.nix
@@ -18,7 +18,7 @@ stdenv.mkDerivation rec {
 
   nativeBuildInputs = [ libfaketime fonttosfnt mkfontscale ];
 
-  phases = [ "buildPhase" "installPhase" ];
+  dontUnpack = true;
 
   buildPhase =
     ''