diff --git a/pkgs/tools/misc/ponysay/default.nix b/pkgs/tools/misc/ponysay/default.nix
index 113c2b05ff59..08f0cf0ed62d 100644
--- a/pkgs/tools/misc/ponysay/default.nix
+++ b/pkgs/tools/misc/ponysay/default.nix
@@ -13,8 +13,6 @@ stdenv.mkDerivation {
 
   inherit python3;
 
-  phases = "unpackPhase installPhase fixupPhase";
-
   installPhase = ''
     find -type f -name "*.py" | xargs sed -i "s@/usr/bin/env python3@$python3/bin/python3@g"
     substituteInPlace setup.py --replace \