diff --git a/pkgs/by-name/si/simplex-chat-desktop/package.nix b/pkgs/by-name/si/simplex-chat-desktop/package.nix
new file mode 100644
index 000000000000..0e1d3d8abcc4
--- /dev/null
+++ b/pkgs/by-name/si/simplex-chat-desktop/package.nix
@@ -0,0 +1,46 @@
+{ lib
+, appimageTools
+, fetchurl
+}:
+
+let
+  pname = "simplex-chat-desktop";
+  version = "5.3.1";
+
+  src = fetchurl {
+    url = "https://github.com/simplex-chat/simplex-chat/releases/download/v${version}/simplex-desktop-x86_64.AppImage";
+    hash = "sha256-vykdi7SXKKsjYE/yixGrKQoWuUIOAjofLUn/fsdmLMc=";
+  };
+
+  appimageContents = appimageTools.extract {
+    inherit pname version src;
+  };
+in appimageTools.wrapType2 {
+    inherit pname version src;
+
+    extraPkgs = pkgs: with pkgs; [
+      makeWrapper
+    ];
+
+    extraBwrapArgs = [
+      "--setenv _JAVA_AWT_WM_NONREPARENTING 1"
+    ];
+
+    extraInstallCommands = ''
+      mv $out/bin/${pname}-${version} $out/bin/${pname}
+
+      install --mode=444 -D ${appimageContents}/chat.simplex.app.desktop --target-directory=$out/share/applications
+      substituteInPlace $out/share/applications/chat.simplex.app.desktop \
+        --replace 'Exec=simplex' 'Exec=${pname}'
+      cp -r ${appimageContents}/usr/share/icons $out/share
+    '';
+
+  meta = with lib; {
+    description = "Desktop application for SimpleX Chat";
+    homepage = "https://simplex.chat";
+    changelog = "https://github.com/simplex-chat/simplex-chat/releases/tag/v${version}";
+    license = licenses.agpl3Only;
+    maintainers = with maintainers; [ yuu ];
+    platforms = [ "x86_64-linux" ];
+  };
+}