diff --git a/pkgs/top-level/beam-packages.nix b/pkgs/top-level/beam-packages.nix
index 6b97c0d131bc..46b0d12a5e91 100644
--- a/pkgs/top-level/beam-packages.nix
+++ b/pkgs/top-level/beam-packages.nix
@@ -73,6 +73,7 @@ rec {
     erlangR17 = packagesWith interpreters.erlangR17;
     erlangR18 = packagesWith interpreters.erlangR18;
     erlangR19 = packagesWith interpreters.erlangR19;
+    erlangR20 = packagesWith interpreters.erlangR20;
 
   };
 }