diff --git a/pkgs/by-name/et/ethr/package.nix b/pkgs/by-name/et/ethr/package.nix
new file mode 100644
index 000000000000..d0dfd5c30f5b
--- /dev/null
+++ b/pkgs/by-name/et/ethr/package.nix
@@ -0,0 +1,33 @@
+{
+  lib,
+  buildGoModule,
+  fetchFromGitHub,
+}:
+
+buildGoModule {
+  pname = "ethr";
+  version = "1.0.0-unstable-2025-12-10";
+
+  src = fetchFromGitHub {
+    owner = "microsoft";
+    repo = "ethr";
+    rev = "86e07049d11357f69da89317d55f11bed62e0007";
+    hash = "sha256-lkhqPq2EDI3J8jiNx0Gygf8fDZvtZ2Pw3rRSt4HVBq8=";
+  };
+
+  vendorHash = "sha256-UHZNe6vlqdYaHzt2IZ5HTQxqR0sf8m9Lfo5tXvpiFlg=";
+
+  # Strip symbol table and DWARF debug info to reduce binary size
+  ldflags = [
+    "-s"
+    "-w"
+  ];
+
+  meta = {
+    description = "Comprehensive Network Measurement Tool for TCP, UDP & ICMP";
+    homepage = "https://github.com/microsoft/ethr";
+    license = lib.licenses.mit;
+    maintainers = [ lib.maintainers.philiptaron ];
+    mainProgram = "ethr";
+  };
+}