diff --git a/maintainers/maintainer-list.nix b/maintainers/maintainer-list.nix
index ea268847edf1..b0bfbd6571ca 100644
--- a/maintainers/maintainer-list.nix
+++ b/maintainers/maintainer-list.nix
@@ -23602,6 +23602,13 @@
     githubId = 1901799;
     name = "Nathan van Doorn";
   };
+  tanya1866 = {
+    email = "tanyaarora@tutamail.com";
+    matrix = "@tanya1866:matrix.org";
+    github = "tanya1866";
+    githubId = 119473725;
+    name = "Tanya Arora";
+  };
   taranarmo = {
     email = "taranarmo@gmail.com";
     github = "taranarmo";
diff --git a/pkgs/by-name/li/libhydrogen/package.nix b/pkgs/by-name/li/libhydrogen/package.nix
new file mode 100644
index 000000000000..eda73c73877d
--- /dev/null
+++ b/pkgs/by-name/li/libhydrogen/package.nix
@@ -0,0 +1,65 @@
+{
+  lib,
+  stdenv,
+  fetchFromGitHub,
+  testers,
+  pkg-config,
+}:
+
+stdenv.mkDerivation (finalAttrs: {
+  pname = "libhydrogen";
+  version = "0-unstable-2025-04-06";
+
+  src = fetchFromGitHub {
+    owner = "jedisct1";
+    repo = "libhydrogen";
+    rev = "bbca575b62510bfdc6dd927a4bfa7df4a51cb846";
+    hash = "sha256-sLOE3oR53hmvRqIPD5PU9Q04TFqw2KuWT1OQBA/KdRc=";
+  };
+
+  outputs = [
+    "out"
+    "dev"
+  ];
+
+  nativeBuildInputs = [ pkg-config ];
+  enableParallelBuilding = true;
+
+  makeFlags = [
+    "PREFIX=${placeholder "out"}"
+    "INCLUDE_INSTALL_DIR=${placeholder "dev"}/include"
+    "LIBRARY_INSTALL_DIR=${placeholder "out"}/lib"
+    "PKGCONFIG_INSTALL_DIR=${placeholder "dev"}/lib/pkgconfig"
+    "lib"
+  ];
+
+  checkTarget = "test";
+
+  postInstall = ''
+    mkdir -p "$dev/lib/pkgconfig"
+    cat > "$dev/lib/pkgconfig/libhydrogen.pc" <<EOF
+    Name: libhydrogen
+    Description: Lightweight cryptographic library
+    Version: ${finalAttrs.version}
+    Libs: -L$out/lib -lhydrogen
+    Cflags: -I$dev/include
+    EOF
+  '';
+
+  doCheck = true;
+
+  preCheck = ''
+    export LD_LIBRARY_PATH=$PWD:$LD_LIBRARY_PATH
+  '';
+
+  passthru.tests.pkg-config = testers.testMetaPkgConfig finalAttrs.finalPackage;
+
+  meta = {
+    description = "Lightweight, secure, easy-to-use crypto library suitable for constrained environments";
+    homepage = "https://github.com/jedisct1/libhydrogen";
+    license = lib.licenses.isc;
+    maintainers = [ lib.maintainers.tanya1866 ];
+    pkgConfigModules = [ "libhydrogen" ];
+    platforms = lib.platforms.all;
+  };
+})