diff --git a/pkgs/development/beam-modules/erlang-ls/default.nix b/pkgs/development/beam-modules/erlang-ls/default.nix
index a2739e4b6f6f..4bd4a43b7832 100644
--- a/pkgs/development/beam-modules/erlang-ls/default.nix
+++ b/pkgs/development/beam-modules/erlang-ls/default.nix
@@ -11,6 +11,9 @@ let
       proper = super.proper.overrideAttrs (_: {
         configurePhase = "true";
       });
+      redbug = super.redbug.overrideAttrs (_: {
+        patchPhase = "sed -i 's/, warnings_as_errors//' rebar.config";
+      });
     });
   };
 in