diff --git a/doc/release-notes/rl-2605.section.md b/doc/release-notes/rl-2605.section.md
index 2eb5902778ed..30edd8d322e0 100644
--- a/doc/release-notes/rl-2605.section.md
+++ b/doc/release-notes/rl-2605.section.md
@@ -103,6 +103,8 @@
 
 - Ethercalc and its associated module have been removed, as the package is unmaintained and cannot be installed from source with npm now.
 
+- `coreth` has been removed, as upstream has moved it into `avalanchego`.
+
 - `nodePackages.prebuild-install` was removed because it appeared to be unmaintained upstream.
   See [upstream's recommendations for alternatives](https://github.com/prebuild/prebuild-install#note).
 
diff --git a/pkgs/by-name/co/coreth/package.nix b/pkgs/by-name/co/coreth/package.nix
deleted file mode 100644
index 742ca2c7ca8d..000000000000
--- a/pkgs/by-name/co/coreth/package.nix
+++ /dev/null
@@ -1,45 +0,0 @@
-{
-  buildGoModule,
-  fetchFromGitHub,
-  lib,
-}:
-
-buildGoModule rec {
-  pname = "coreth";
-  version = "0.15.3";
-
-  src = fetchFromGitHub {
-    owner = "ava-labs";
-    repo = "coreth";
-    rev = "v${version}";
-    hash = "sha256-c2Z0rstaOTVsMmOJbHeYJ1rxFHOA/kUzj8k8z56APZ8=";
-  };
-
-  # go mod vendor has a bug, see: golang/go#57529
-  proxyVendor = true;
-
-  vendorHash = "sha256-V0IzZbJ1KfSSF/NL4a14mL+hwXF213HM5WJS3mmT4mQ=";
-
-  ldflags = [
-    "-s"
-    "-w"
-    "-X github.com/ava-labs/coreth/plugin/evm.Version=${version}"
-    "-X github.com/ava-labs/coreth/cmd/abigen.gitCommit=${version}"
-    "-X github.com/ava-labs/coreth/cmd/abigen.gitDate=1970-01-01"
-  ];
-
-  subPackages = [
-    "cmd/abigen"
-    "plugin"
-  ];
-
-  postInstall = "mv $out/bin/{plugin,evm}";
-
-  meta = {
-    description = "Code and wrapper to extract Ethereum blockchain functionalities without network/consensus, for building custom blockchain services";
-    homepage = "https://github.com/ava-labs/coreth";
-    changelog = "https://github.com/ava-labs/coreth/releases/tag/v${version}";
-    license = lib.licenses.lgpl3Only;
-    maintainers = [ ];
-  };
-}
diff --git a/pkgs/top-level/aliases.nix b/pkgs/top-level/aliases.nix
index 983b957f5d2c..4dc3a14a1875 100644
--- a/pkgs/top-level/aliases.nix
+++ b/pkgs/top-level/aliases.nix
@@ -485,6 +485,7 @@ mapAliases {
   copper = throw "'copper' has been removed, as it was broken since 22.11"; # Added 2025-08-22
   cordless = throw "'cordless' has been removed due to being archived upstream. Consider using 'discordo' instead."; # Added 2025-06-07
   corepack_latest = throw "'corepack_latest' has been removed, use 'corepack.override { nodejs = pkgs.nodejs_latest; }' instead"; # Added 2025-10-25
+  coreth = throw "'coreth' has been moved to 'avalanchego' by upstream"; # Added 2026-01-15
   cosmic-tasks = throw "'cosmic-tasks' has been renamed to/replaced by 'tasks'"; # Converted to throw 2025-10-27
   cotton = throw "'cotton' has been removed since it is vulnerable to CVE-2025-62518 and upstream is unmaintained"; # Added 2025-10-26
   cpp-ipfs-api = throw "'cpp-ipfs-api' has been renamed to/replaced by 'cpp-ipfs-http-client'"; # Converted to throw 2025-10-27