diff --git a/pkgs/applications/audio/sonic-pi/default.nix b/pkgs/applications/audio/sonic-pi/default.nix
index 9a45ba77ca6a..221f67badc02 100644
--- a/pkgs/applications/audio/sonic-pi/default.nix
+++ b/pkgs/applications/audio/sonic-pi/default.nix
@@ -17,7 +17,7 @@
   crossguid,
   reproc,
   platform-folders,
-  ruby,
+  ruby_3_2,
   erlang,
   elixir,
   beamPackages,
@@ -40,6 +40,11 @@
   fmt,
 }:
 
+# Sonic Pi fails to build with Ruby 3.3.
+let
+  ruby = ruby_3_2;
+in
+
 stdenv.mkDerivation rec {
   pname = "sonic-pi";
   version = "4.5.1";