diff --git a/pkgs/by-name/em/emhash/package.nix b/pkgs/by-name/em/emhash/package.nix
new file mode 100644
index 000000000000..8a66cc2f4e7d
--- /dev/null
+++ b/pkgs/by-name/em/emhash/package.nix
@@ -0,0 +1,39 @@
+{
+  lib,
+  stdenv,
+  fetchFromGitHub,
+  cmake,
+  nix-update-script,
+}:
+stdenv.mkDerivation (finalAttrs: {
+  pname = "emhash";
+  version = "1.0.1";
+
+  src = fetchFromGitHub {
+    owner = "ktprime";
+    repo = "emhash";
+    tag = "v${finalAttrs.version}";
+    hash = "sha256-dFj/QaGdTJYdcxKlS9tES6OHae8xPMnrG9ccRNM/hi8=";
+  };
+
+  nativeBuildInputs = [
+    cmake
+  ];
+
+  cmakeFlags = [
+    # By default, it will try to build the benchmark suite,
+    # but we only care about the headers copied by the install target.
+    "-DWITH_BENCHMARKS=Off"
+  ];
+
+  passthru.update-script = nix-update-script { };
+
+  meta = {
+    homepage = "https://github.com/ktprime/emhash";
+    changelog = "https://github.com/ktprime/emhash/releases/tag/v${finalAttrs.version}";
+    description = "Fast and memory efficient c++ flat hash map/set";
+    license = lib.licenses.mit;
+    maintainers = with lib.maintainers; [ blenderfreaky ];
+    platforms = lib.platforms.all;
+  };
+})