diff --git a/pkgs/development/tools/misc/chruby/default.nix b/pkgs/development/tools/misc/chruby/default.nix
index bcc0687f55b6..1aef6d52075f 100644
--- a/pkgs/development/tools/misc/chruby/default.nix
+++ b/pkgs/development/tools/misc/chruby/default.nix
@@ -19,8 +19,6 @@ in stdenv.mkDerivation rec {
     sha256 = "1894g6fymr8kra9vwhbmnrcr58l022mcd7g9ans4zd3izla2j3gx";
   };
 
-  phases = [ "unpackPhase" "patchPhase" "installPhase" "fixupPhase" ];
-
   patches = lib.optionalString (rubies != null) [
     ./env.patch
   ];