From 4ee14d2120519e18b3a8c15268d58232c8448920 Mon Sep 17 00:00:00 2001
From: "Adam C. Stephens" <adam@valkor.net>
Date: Sat, 10 Jan 2026 22:20:57 -0500
Subject: [PATCH] beamPackages.elixir_1_20: init at 1.20.0-rc.1

Changelog: https://github.com/elixir-lang/elixir/releases/tag/v1.20.0-rc.1
---
 pkgs/development/beam-modules/default.nix     | 5 +++++
 pkgs/development/interpreters/elixir/1.19.nix | 2 +-
 pkgs/development/interpreters/elixir/1.20.nix | 7 +++++++
 pkgs/top-level/beam-packages.nix              | 1 +
 4 files changed, 14 insertions(+), 1 deletion(-)
 create mode 100644 pkgs/development/interpreters/elixir/1.20.nix

diff --git a/pkgs/development/beam-modules/default.nix b/pkgs/development/beam-modules/default.nix
index b2c6e263134a..0bcee85e7fcc 100644
--- a/pkgs/development/beam-modules/default.nix
+++ b/pkgs/development/beam-modules/default.nix
@@ -48,6 +48,11 @@ let
       # BEAM-based languages.
       elixir = elixir_1_18;
 
+      elixir_1_20 = callPackage ../interpreters/elixir/1.20.nix {
+        inherit erlang;
+        debugInfo = true;
+      };
+
       elixir_1_19 = callPackage ../interpreters/elixir/1.19.nix {
         inherit erlang;
         debugInfo = true;
diff --git a/pkgs/development/interpreters/elixir/1.19.nix b/pkgs/development/interpreters/elixir/1.19.nix
index 9444d4958a01..48694f1dc661 100644
--- a/pkgs/development/interpreters/elixir/1.19.nix
+++ b/pkgs/development/interpreters/elixir/1.19.nix
@@ -1,7 +1,7 @@
 import ./generic-builder.nix {
   version = "1.19.5";
   hash = "sha256-ph7zu0F5q+/QZcsVIwpdU1icN84Rn3nIVpnRelpRIMQ=";
-  # https://hexdocs.pm/elixir/1.19.0-rc.1/compatibility-and-deprecations.html#between-elixir-and-erlang-otp
+  # https://hexdocs.pm/elixir/1.19.5/compatibility-and-deprecations.html#between-elixir-and-erlang-otp
   minimumOTPVersion = "26";
   maximumOTPVersion = "28";
 }
diff --git a/pkgs/development/interpreters/elixir/1.20.nix b/pkgs/development/interpreters/elixir/1.20.nix
new file mode 100644
index 000000000000..861aea892bbe
--- /dev/null
+++ b/pkgs/development/interpreters/elixir/1.20.nix
@@ -0,0 +1,7 @@
+import ./generic-builder.nix {
+  version = "1.20.0-rc.1";
+  hash = "sha256-FuTZHDI8ZNe6SHjiaPDZh21Ah7ek4kHqlYVvx0ybqI4=";
+  # https://hexdocs.pm/elixir/1.20.0-rc.1/compatibility-and-deprecations.html#between-elixir-and-erlang-otp
+  minimumOTPVersion = "26";
+  maximumOTPVersion = "28";
+}
diff --git a/pkgs/top-level/beam-packages.nix b/pkgs/top-level/beam-packages.nix
index fecf5d78208b..b4df907bb50d 100644
--- a/pkgs/top-level/beam-packages.nix
+++ b/pkgs/top-level/beam-packages.nix
@@ -51,6 +51,7 @@ in
     # `beam.packages.erlang_27.elixir`.
     inherit (self.packages.erlang)
       elixir
+      elixir_1_20
       elixir_1_19
       elixir_1_18
       elixir_1_17