diff --git a/pkgs/development/libraries/monocypher/default.nix b/pkgs/development/libraries/monocypher/default.nix
new file mode 100644
index 000000000000..7ce84cbba835
--- /dev/null
+++ b/pkgs/development/libraries/monocypher/default.nix
@@ -0,0 +1,33 @@
+{ lib, stdenv, fetchurl, fetchpatch }:
+
+stdenv.mkDerivation rec {
+  pname = "monocypher";
+  version = "3.1.3";
+
+  src = fetchurl {
+    url = "https://monocypher.org/download/monocypher-${version}.tar.gz";
+    hash = "sha256-tEK1d98o+MNsqgHZrpARtd2ccX2UvlIBaKBONtf1AW4=";
+  };
+
+  patches = [
+    # Fix cross-compilation
+    (fetchpatch {
+      url = "https://github.com/LoupVaillant/Monocypher/commit/376715e1c0ebb375e50dfa757bc89486c9a7b404.patch";
+      hash = "sha256-tuwSUaU4w+jkaj10ChMgUmOQmoKYnv5JgJ1og8EXxFk=";
+    })
+  ];
+
+  makeFlags = [ "AR:=$(AR)" "CC:=$(CC)" ];
+
+  installFlags = [ "PREFIX=$(out)" ];
+
+  doCheck = true;
+
+  meta = with lib; {
+    description = "Boring crypto that simply works";
+    homepage = "https://monocypher.org";
+    license = with licenses; [ bsd2 cc0 ];
+    platforms = platforms.linux;
+    maintainers = with maintainers; [ sikmir ];
+  };
+}
diff --git a/pkgs/top-level/all-packages.nix b/pkgs/top-level/all-packages.nix
index ae72b3c5d7b6..9cf47750d161 100644
--- a/pkgs/top-level/all-packages.nix
+++ b/pkgs/top-level/all-packages.nix
@@ -28315,6 +28315,8 @@ with pkgs;
     mopidy-youtube
     mopidy-ytmusic;
 
+  monocypher = callPackage ../development/libraries/monocypher { };
+
   motif = callPackage ../development/libraries/motif { };
 
   mousai = callPackage ../applications/audio/mousai { };