diff --git a/pkgs/tools/networking/ngrok-2/default.nix b/pkgs/tools/networking/ngrok-2/default.nix
index 031161da4d57..23725fb2d874 100644
--- a/pkgs/tools/networking/ngrok-2/default.nix
+++ b/pkgs/tools/networking/ngrok-2/default.nix
@@ -1,31 +1,38 @@
 { stdenv, fetchurl, unzip }:
 
+with stdenv.lib;
+
 stdenv.mkDerivation rec {
   name = "ngrok-${version}";
   version = "2.2.8";
 
-  src = if stdenv.system == "i686-linux" then fetchurl {
+  src = if stdenv.isLinux && stdenv.isi686 then fetchurl {
     url = "https://bin.equinox.io/c/4VmDzA7iaHb/ngrok-stable-linux-i386.tgz";
     sha256 = "0s5ymlaxrvm13q3mlvfirh74sx60qh56c5sgdma2r7q5qlsq41xg";
-  } else if stdenv.system == "x86_64-linux" then fetchurl {
+  } else if stdenv.isLinux && stdenv.isx86_64 then fetchurl {
     url = "https://bin.equinox.io/c/4VmDzA7iaHb/ngrok-stable-linux-amd64.tgz";
     sha256 = "1mn9iwgy6xzrjihikwc2k2j59igqmph0cwx17qp0ziap9lp5xxad";
+  } else if stdenv.isDarwin then fetchurl {
+    url = "https://bin.equinox.io/c/4VmDzA7iaHb/ngrok-stable-darwin-386.zip";
+    sha256 = "0yfd250b55wcpgqd00rqfaa7a82f35fmybb31q5xwdbgc2i47pbh";
   } else throw "platform ${stdenv.system} not supported!";
 
   sourceRoot = ".";
 
+  nativeBuildInputs = optional stdenv.isDarwin unzip;
+
   installPhase = ''
     install -D ngrok $out/bin/ngrok
   '';
 
-  meta = with stdenv.lib; {
+  meta = {
     description = "ngrok";
     longDescription = ''
       Allows you to expose a web server running on your local machine to the internet.
     '';
     homepage = https://ngrok.com/;
-    license = stdenv.lib.licenses.unfree;
-    platforms = [ "i686-linux" "x86_64-linux" ];
+    license = licenses.unfree;
+    platforms = [ "i686-linux" "x86_64-linux" "x86_64-darwin" ];
     maintainers = [ maintainers.bobvanderlinden ];
   };
 }