diff --git a/pkgs/by-name/mi/mio/package.nix b/pkgs/by-name/mi/mio/package.nix
new file mode 100644
index 000000000000..845408564c58
--- /dev/null
+++ b/pkgs/by-name/mi/mio/package.nix
@@ -0,0 +1,30 @@
+{
+  lib,
+  stdenv,
+  fetchFromGitHub,
+  cmake,
+}:
+
+stdenv.mkDerivation (finalAttrs: {
+  pname = "mio";
+  version = "unstable-2023-03-03";
+
+  src = fetchFromGitHub {
+    owner = "vimpunk";
+    repo = "mio";
+    rev = "8b6b7d878c89e81614d05edca7936de41ccdd2da";
+    hash = "sha256-j/wbjyI2v/BsFz2RKi8ZxMKuT+7o5uI4I4yIkUran7I=";
+  };
+
+  nativeBuildInputs = [
+    cmake
+  ];
+
+  meta = {
+    description = "Cross-platform C++11 header-only library for memory mapped file IO";
+    homepage = "https://github.com/vimpunk/mio";
+    license = lib.licenses.mit;
+    maintainers = [ lib.maintainers.szanko ];
+    platforms = lib.platforms.all;
+  };
+})