diff --git a/doc/languages-frameworks/ruby.xml b/doc/languages-frameworks/ruby.xml
index 89b7a8986c3c..647a30481e3e 100644
--- a/doc/languages-frameworks/ruby.xml
+++ b/doc/languages-frameworks/ruby.xml
@@ -111,7 +111,6 @@ the needed dependencies. For example, to make a derivation
 in stdenv.mkDerivation {
   name = "my-script";
   buildInputs = [ env.wrappedRuby ];
-  phases = [ "installPhase" "fixupPhase" ];
   script = ./my-script.rb;
   buildCommand = ''
     install -D -m755 $script $out/bin/my-script