From 99ab831a06acf12767c938c57d8bf3d869cd4bb2 Mon Sep 17 00:00:00 2001
From: "Adam C. Stephens" <adam@valkor.net>
Date: Tue, 24 Dec 2024 09:47:00 -0500
Subject: [PATCH] erlang: fix updateScript

---
 pkgs/development/interpreters/erlang/generic-builder.nix | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/pkgs/development/interpreters/erlang/generic-builder.nix b/pkgs/development/interpreters/erlang/generic-builder.nix
index 499d3b7f879f..df349d965743 100644
--- a/pkgs/development/interpreters/erlang/generic-builder.nix
+++ b/pkgs/development/interpreters/erlang/generic-builder.nix
@@ -250,7 +250,7 @@ stdenv.mkDerivation (
           if [ "$latest" != "${version}" ]; then
             nixpkgs="$(git rev-parse --show-toplevel)"
             nix_file="$nixpkgs/pkgs/development/interpreters/erlang/${major}.nix"
-            update-source-version ${baseName}R${major} "$latest" --version-key=version --print-changes --file="$nix_file"
+            update-source-version ${baseName}_${major} "$latest" --version-key=version --print-changes --file="$nix_file"
           else
             echo "${baseName}R${major} is already up-to-date"
           fi